unsrt bibtex 模式带下划线

Question

我对参考书目中的下划线有问题。我正在使用包

\bibliographystyle{unsrt}

在报告模式下。并像这样介绍参考书目

@incollection{HandbookAdvancedCeramics,
editor = "Shigeyuki Somiya",
booktitle = "Handbook of Advanced Ceramics",
publisher = "Academic Press",
edition = "Second Edition",
year = "2013"
}

或者

@phdthesis{OxidationZrB2SiCUHT,
    title    = {Oxidation Behavior of Zirconium Diboride - Silicon Carbide Based Materials at Ultra-High Temperatures},
    school   = {University of Virginia},
    author   = {Kathleen N. Shugart},
    year     = {2014} 
}

它在参考书目页面中显示如下。 但看起来有点随意。有时下划线是标题，有时是杂志名称。

无论如何，我不希望它出现下划线。我该如何更正它？