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引用时 bibtex 中缺少 $

tag-icon • tag-icon bibtex bibliographies
引用时 bibtex 中缺少 $ 
! Missing $ inserted.
<inserted text> 
                $
l.15 ...vard.edu/hub_feeds/1984/feed_items/207289}

?

以下是我在 BibTeX 中的参考文献：

@online{
Mark10,
author = {Mark Easton},
title  = {What is {C}rime?},
date   = {2010-06-17},
url    = {http://www.bbc.co.uk/blogs/the reporters/markeaston/2010/06/what\_is\_crime.html},
Year={2010}}

@online{
Doha15,
author={UNODC},
title={13th {U}nited {N}ations {C}ongress on {C}rime {P}revention and {C}riminal {J}ustice},
date={2015-03-31},
url={http://www.un.org/en/events/crimecongress2015/pdf/Factsheet\_2\_The\_State\_of\_Crime\_EN.pdf},
Year={2015}}

顺便说一句：我使用了包url。

答案1

由于您的两个书目条目都包含一个名为 的字段url，因此我假设您使用的是可以识别此字段的相当现代的书目样式。（此假设排除了较旧的书目样式，例如plain、unsrt、alpha和apalike。）

如果你使用如下书目样式plainnat，那么不必要url“转义” URL 字符串中的下划线字符。相反，请确保加载诸如或 之类的包hyperref。

在此处输入图片描述

\RequirePackage{filecontents}
\begin{filecontents}{mybib.bib}
@online{Mark10,
   author = {Mark Easton},
   title  = {What is {Crime?}},
   date   = {2010-06-17},
   url    = {http://www.bbc.co.uk/blogs/the reporters/markeaston/2010/06/what_is_crime.html},
   Year   = {2010},
}
@online{Doha15,
   author ={UNODC},
   title  ={{13th United Nations Congress on Crime Prevention and Criminal Justice}},
   date   ={2015-03-31},
   url    =  {http://www.un.org/en/events/crimecongress2015/pdf/Factsheet_2_The_State_of_Crime_EN.pdf},
   Year   = {2015},
}
\end{filecontents}

\documentclass{article}
\bibliographystyle{plainnat}
\usepackage{natbib}
\usepackage[hyphens,spaces,obeyspaces]{url}
\usepackage[colorlinks,allcolors=blue]{hyperref}
\begin{document}
\nocite{*}
\bibliography{mybib}
\end{document}

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