当我使用 elsarticle-num 参考书目样式时，如果我在参考书目中放置“url={...}”，那么指向论文网站的链接会出现两次（一次出现在论文名称中，一次出现在参考文献部分的 URL 字段中）。但是，如果我使用“doi={...}”，它只会出现一次。所以我的问题是：如何让非 DOI 参考文献只出现一个链接？下面我附上了一个 MWE 来补贴你的帮助。提前谢谢！！
\documentclass{article}
\usepackage{hyperref}
\begin{document}
\title{Test Url}
A diverse range of distribution functions have been applied: geometric distributions and hidden Markov models~\cite{melodelima2004modelling}, sum of exponentials and pure Weibull distributions~\cite{gudlaugsdottir2007exon},
\bibliographystyle{elsarticle-num}
\bibliography{Bibliography}
\end{document}
下面我给出参考书目文件：
@article{melodelima2004modelling,
title={Modelling the length distribution of exons by sums of geometric laws. Analysis of the structure of genes and G+C influence.},
author={Melodelima, Christelle and Gu{\'e}guen, Laurent and Piau, Didier and Gautier, Christian},
journal={Citeseer},
url={https://core.ac.uk/display/24548251},
year={2004}
}
@article{gudlaugsdottir2007exon,
title={Exon size distribution and the origin of introns},
author={Gudlaugsdottir, Sigurbjorg and Boswell, D Ross and Wood, Graham R and Ma, Jun},
journal={Genetica},
doi={10.1007/s10709-007-9139-4},
volume={131},
number={3},
pages={299--306},
year={2007},
publisher={Springer}
}
其编译结果为：
