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Natbib——文内引用中的“circa”

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Natbib——文内引用中的“circa”

我已经按照以下说明在我的 .bib 文件中使用 natbib 实现了 circa 标签这个 tex.stackexchange.com 答案。

有没有一种简单的方法可以修改它，以便我可以在文内引用中生成“ca。”？据我所知，natbib 提取年份字段中的最后四个字符以在文内引用中生成，因此我不确定如何轻松地在前面添加字符而不执行\xpatchcmd{}或类似操作。

梅威瑟：

是.bst​这里。

\documentclass{article}

\usepackage{url}
\usepackage{csquotes}
\usepackage{natbib}
\usepackage{filecontents}

\newcommand{\noopsort}[1]{} % old BibTeX trick

\begin{filecontents}[overwrite]{\jobname.bib}
@book{dante_paradiso_1317,
    title = {Paradiso},
    author = {Alighieri, Dante},
    year = {\noopsort{1317}ca. 1317},
    note = {Canto XVI}
}

@book{asimov_robot_1950,
  title={I, Robot},
  author={Asimov, I.},
  isbn={9780451012821},
  lccn={68070665},
  series={Panther science fiction},
  url={https://books.google.co.nz/books?id=MD0GAQAAIAAJ},
  year={1950},
  publisher={Dennis Dobson}
}

\end{filecontents}

\begin{document}
    In \textit{Paradiso}, Dante writes
    
    \begin{displayquote}
        E come 'l volger del ciel de la luna \\
        cuopre e discuopre i liti sanza posa, \\
        così fa di Fiorenza la Fortuna: \\
        \begin{flushright}
            -- Alighieri (ca. 1317)\nocite{dante_paradiso_1317}
        \end{flushright}
    \end{displayquote}

    which is a really cool line in Canto XVI. Also in \textit{I, Robot}, Asimov introduces the three laws of robotics:

    \begin{displayquote}
        The First Law: A robot may not injure a human being or, through inaction, allow a human being to come to harm. \\
        The Second Law: A robot must obey the orders given it by human beings except where such orders would conflict with the First Law. \\
        The Third Law: A robot must protect its own existence as long as such protection does not conflict with the First or Second Law.
        \begin{flushright}
            -- \citet{asimov_robot_1950}
        \end{flushright}
    \end{displayquote}

    \bibliographystyle{mnras}
    \bibliography{\jobname.bib}
\end{document}

MWE 输出：

MWE 的输出。

期望输出：

我想要的输出

答案1

简而言之，我需要编辑.bst文件。在 的定义中calc.label，

  year field.or.null purify$ #-1 #4 substring$  % use all four digits

变成

  year field.or.null #-1 #8 substring$  % use all eight characters (year + "ca. " if it exists)

如果要使用较短的“ca. ”，请更改#8。数字必须是4+number of characters preceding the year in the .bib key to include。

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