将 Overleaf 的 .bib 文件转换为 TexStudio 的 .bib 文件

Question

您的 bib 文件包含许多不一致和错误。其中之一是对@article似乎未在学术期刊上发表的条目使用条目类型；我建议您@misc对这些条目使用全能条目类型——当然，除非您能想出更好的替代方案。您的很多条目都未能有效使用该date字段，这是 biblatex/biber 的新字段，并且 BibTeX 无法识别。

场

publisher= {Graduate Texts in Mathematics 218, Springer Verlag},

结合应分布在三个领域的信息：

series   = {Graduate Texts in Mathematics},
number   = {218},
publisher= {Springer Verlag},

你还会问，

我的问题是：引用未定义，为什么？

由于您的帖子不包含任何\cite说明，因此根本无法通过您选择提供的信息来回答这个问题。

以下屏幕截图显示了更新后的 bib 文件的前几个条目。它是使用 TeXworks 作为前端、MacTeX2023 作为后端进行编译的。只要您的 TeX 发行版设置正确且相当最新，您使用 TeXstudio 重新创建它应该不会有问题。

\documentclass{article} % or some other suitable document class

%% create a bib file "on the fly":
\begin{filecontents}[overwrite]{mybib.bib}
@book{geodiff,
  author   = {Graziano Gentili and Fabio Podestà and Edoardo Vesentini},
  year     = {1995},
  title    = {Lezioni di Geometria Differenziale},
  publisher= {Bollati Boringhieri},
  address  = {Torino},
  edition  = {1},
  pages    = {3-6,11,13,22,29,31-33,42-45},
  keyword  = {Geometria Differenziale}
}

@book{lee,
  author   = {John Marshall Lee},
  year     = {2018},
  title    = {Introduction to Smooth Manifolds},
  series   = {Graduate Texts in Mathematics},
  number   = 218,
  publisher= {Springer Verlag},
  address  = {New York},
  edition  = {2},
  pages    = {490-514},
  keyword  = {Geometria Differenziale}
}

@misc{wikien,
  author   = {Wikipedia},
  date     = {2023-05-15},
  title    = {Frobenius theorem (differential topology)},
  publisher= {Internet},
  keyword  = {Geometria Differenziale}
}

@misc{wikifr,
  author   = {Wikipedia},
  date     = {2022-08-23},
  title    = {Théorème de Frobenius (géométrie différentielle)},
  publisher= {Internet},
  keyword  = {Geometria Differenziale}
}

%https://en.wikipedia.org/wiki/Sheaf_(mathematics)

@misc{wikien2,
  author   = {Wikipedia},
  date     = {2023-09-02},
  title    = {Sheaf (mathematics)},
  publisher= {Internet},
  keyword  = {Geometria Differenziale}
}

@book{mechanics,
  author   = {Ralph Abraham and Jerrold Eldon Marsden},
  year     = {2008},
  title    = {Foundations of Mechanics},
  publisher= {Addison-Wesley Publishing Company, lnc.},
  address  = {California},
  edition  = {2},
  pages    = {93-95},
  keyword  = {Meccanica}
}

@book{malusa,
  author   = {Annalisa Malusa},
  month    = aug,
  year     = {2022},
  title    = {Introduzione alle Equazioni Differenziali Oridinarie},
  publisher= {Indipendently published},
  address  = {Torrazza Piemonte (TO)},
  edition  = {2},
  pages    = {47-67},
  keyword  = {Analisi}
}

@article{Frobenius,
  author   = {George Ferdinand Frobenius},
  journal  = {Journal für die reine und angewandte Mathematik},
  pages    = {230-315},
  title    = {Über das Pfaffsche Problem},
  url      = {http://eudml.org/doc/148315},
  volume   = {82},
  year     = {1877},
  keyword  = {Geometria Differenziale}
}

@misc{han,
  author   = {Chong-Kyu Han},
  month    = may,
  year     = {2023},
  title    = {Generalization of the Frobenius Theorem on involutivity},
  url      = {http://www.math.snu.ac.kr/~ckhan/paperpdf/generalfrobenius.pdf},
  publisher= {Internet},
  keyword  = {Geometria Differenziale}
}

@misc{robbinsalomon,
  author   = {Joel William Robbin and Dietmar Arno Salamon},
  %year = {Maggio 2023},
  title    = {Introduction to Differential Geometry},
  date     = {2022-10-11},
  publisher= {Internet},
  url      = {https://people.math.ethz.ch/~salamon/PREPRINTS/diffgeo.pdf},
  %publisher = {Internet},
  keyword  = {Geometria Differenziale}
}

@misc{clebsch,
  author   = {Rudolf Friedrich Alfred Clebsch},
  title    = {{Über die simultane Integration linearer partieller Differentialgleichungen.}},
  xmonth   = {Gennaio},
  date     = {1866-01-01},
  publisher= {Zenodo},
  %pages = {230-315},
  doi      = {10.1515/crll.1866.65.257},
  url      = {https://doi.org/10.1515/crll.1866.65.257},
  keyword  = {Geometria Differenziale}
}

@misc{deahna,
  author   = {Heinrich Wilhelm Feodor Deahna},
  title    = {{Über die Bedingungen der Integrabilität linearer 
             Differentialgleichungen erster Ordnung zwischen einer 
             beliebigen Anzahl veränderlicher Größen}},
  date     = {1840-01-01},
  publisher= {Zenodo},
  %pages = {230-315},
  doi      = {10.1515/crll.1840.20.340},
  url      = {https://doi.org/10.1515/crll.1840.20.340}
}

@misc{whitney36,
  author   = {Hassler Whitney},
  title    = {Differentiable manifolds},
  xmonth   = {Febbraio},
  date     = {1936-02-10},
  publisher= {JSTOR},
  pages    = {230--315},
  doi      = {10.1515/crll.1866.65.257},
  url      = {https://people.math.osu.edu/davis.12/courses/6701/whitney36.pdf},
  keyword  = {Geometria Differenziale}
}

@book{osborn,
  author   = {Howard Osborn},
  title    = {Vector Bundles, Vol. 1, Foundations and Stielel-Whitney Classes},
  publisher= {Academic Press},
  year     = 1982,
  pages    = {28, 29, 50--52, 260, 291--294},
  url      = {https://www.maths.ed.ac.uk/~v1ranick/papers/osborn.pdf},
  keyword  = {Geometria Differenziale}
}

@isc{milnorS7,
  author   = {John Wellard Milnor},
  title    = {On Manifolds Homeomorphic to the 7-Sphere},
  xmonth   = {Giugno},
  date     = {1956-06-14},
  publisher= {JSTOR},
  %pages = {230-315},
  %doi = {10.1515/crll.1866.65.257},
  url      = {https://people.math.osu.edu/burghelea.1/MaterialDiffTopology/Milnorsphere.pdf},
  keyword  = {Geometria Differenziale}
}

@misc{kervaire10,
  author   = {Michel André Kervaire},
  title    = {A Manifold which does not admit any Differentiable Structure},
  xmonth   = {Dicembre},
  date     = {2011-12-12},
  publisher= {JSTOR},
  %pages = {230-315},
  %doi = {10.1515/crll.1866.65.257},
  url      = {https://people.math.rochester.edu/faculty/doug/otherpapers/kervaire.pdf},
  keyword  = {Geometria Differenziale}
}

@article{penot,
  author   = {Nicolas Hadjisavvas and Jean-Paul Penot},
  title    = {Revisiting the problem of integrability in utility theory},
  pages    = {1-15},
  xmonth   = {Settembre},
  date     = {2015-09-01},
  volume   = {64},
  journal  = {Optimization},
  doi      = {10.1080/02331934.2015.1080701},
  keyword  = {Economia}
}

@article{samuelson,
  ISSN     = {00130427, 14680335},
  URL      = {http://www.jstor.org/stable/2549499},
  author   = {Paul Anthony Samuelson},
  journal  = {Economica},
  number   = {68},
  pages    = {355--385},
  publisher= {[London School of Economics, Wiley, London School of Economics 
               and Political Science, Suntory and Toyota International Centres 
               for Economics and Related Disciplines]},
  title    = {The Problem of Integrability in Utility Theory},
  urldate  = {2024-02-26},
  volume   = {17},
  year     = {1950},
  keyword  = {Economia}
}

@article{samuelson2,
 ISSN      = {00130427, 14680335},
 URL       = {http://www.jstor.org/stable/2549561},
 author    = {Paul Anthony Samuelson},
 journal   = {Economica},
 number    = {60},
 pages     = {243--253},
 publisher = {[London School of Economics, Wiley, London School of Economics 
               and Political Science, Suntory and Toyota International Centres 
               for Economics and Related Disciplines]},
 title     = {Consumption Theory in Terms of Revealed Preference},
 urldate   = {2024-02-27},
 volume    = {15},
 year      = {1948}
}

@book{dieudonne,
  title    = {Foundations of Modern Analysis},
  author   = {Jean Dieudonné},
  isbn     = {9781446547519},
  url      = {https://books.google.it/books?id=gU58CgAAQBAJ},
  year     = {2011},
  publisher= {Read Books Ltd.}
}
\end{filecontents}

\usepackage[T1]{fontenc}
\usepackage[italian]{babel}
\usepackage[backend=biber, style=alphabetic, sorting=ynt]{biblatex}
\addbibresource{mybib.bib}
\usepackage{xurl} % allow arbitrary line breaks in URL strings

\begin{document}
\nocite{*}
\printbibliography
\end{document}

Answer 1