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Overleaf 参考文献中显示在线引用（????）

tag-icon • tag-icon bibliographies citing overleaf online bibliographystyle
Overleaf 参考文献中显示在线引用（????）

这是我的 MWE，其中包含完整文档中的所有包。

\begin{filecontents*}{example.eps}
%!PS-Adobe-3.0 EPSF-3.0
%%BoundingBox: 19 19 221 221
%%CreationDate: Mon Sep 29 1997
%%Creator: programmed by hand (JK)
%%EndComments
gsave
newpath
  20 20 moveto
  20 220 lineto
  220 220 lineto
  220 20 lineto
closepath
2 setlinewidth
gsave
  .4 setgray fill
grestore
stroke
grestore
\end{filecontents*}

\RequirePackage{fix-cm}
\documentclass[twocolumn]{svjour3} 
\smartqed  
\usepackage{caption}
\usepackage{subcaption}
\usepackage{graphicx}
\usepackage{amsmath}
% \usepackage{amssymb}
\usepackage{float}
\usepackage[sort&compress,numbers]{natbib}
\usepackage{latexsym}
\usepackage{amsfonts}
\usepackage[normalem]{ulem}
\usepackage{soul}
\usepackage{array}
\usepackage{amssymb}
\usepackage{extarrows}
\usepackage{graphicx}
\usepackage{subcaption}
\usepackage{subfig}
\usepackage{wrapfig}
\usepackage{wasysym}
\usepackage{enumitem}
\usepackage{adjustbox}
\usepackage{ragged2e}
\usepackage[svgnames,table]{xcolor}
\usepackage{tikz}
\usepackage{longtable}
\usepackage{changepage}
\usepackage{setspace}
\usepackage{hhline}
\usepackage{multicol}
\usepackage{tabto}
\usepackage{float}
\usepackage{multirow}
\usepackage{makecell}
\usepackage{fancyhdr}
\usepackage[table]{xcolor}
\usepackage[toc,page]{appendix}
\usepackage[hidelinks]{hyperref}
\usetikzlibrary{shapes.symbols,shapes.geometric,shadows,arrows.meta}
\tikzset{>={Latex[width=1.5mm,length=2mm]}}
\usepackage{flowchart}\usepackage[paperheight=11.0in,paperwidth=8.5in,left=1.0in,right=1.0in,top=1.0in,bottom=1.0in,headheight=1in]{geometry}
\usepackage[utf8]{inputenc}
\usepackage[T1]{fontenc}
\TabPositions{0.5in,1.0in,1.5in,2.0in,2.5in,3.0in,3.5in,4.0in,4.5in,5.0in,5.5in,6.0in,}
\setcitestyle{numbers,square}
\usepackage[english]{babel}
\usepackage{algorithm2e,algorithmic}
\usepackage[noend]{algpseudocode}


\begin{document}

\section{Introduction}

\label{intro}
This is citation of online web page \cite{online1}. Another online \cite{online2}. Another online \cite{online3}. This is random citation of research papers. \cite{simonyan2014very}. Another paper \cite{he2016deep}
\newline

\bibliographystyle{spbasic_unsort}   
\bibliography{reference}   
\end{document}
% end of file template.tex

此外，我还在下面添加了我的reference.bib文件的内容。

\usepackage{xurl}



@online{online1,
  author = {Collins Online English Dictionary},
  title = {Language},
  year = {},
  url = {https://www.collinsdictionary.com/dictionary/english/language},
  urldate = {2021-01-08}
}

@online{online2,
  title={Sign Language},
  author = {Wikipedia},
  url = {https://en.wikipedia.org/wiki/Sign_language},
  urldate = {2021-01-08}
}

@online{online3,
  title={What is Sign Language?},
  author = {David M. Perlmutter },
  
  url = {https://www.linguisticsociety.org/content/what-sign-language},
  urldate = {2021-01-08}
}



@article{simonyan2014very,
  title={Very deep convolutional networks for large-scale image recognition},
  author={Simonyan, Karen and Zisserman, Andrew},
  journal={arXiv preprint arXiv:1409.1556},
  year={2014}
}

@inproceedings{he2016deep,
  title={Deep residual learning for image recognition},
  author={He, Kaiming and Zhang, Xiangyu and Ren, Shaoqing and Sun, Jian},
  booktitle={Proceedings of the IEEE conference on computer vision and pattern recognition},
  pages={770--778},
  year={2016}
}

输出结果如下。请注意，只有在线参考资料包含 (????)。我想删除这些问号。输出

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