Book title in Revtex bibliography

Question

I'm writing an article using revtex4-1 format, and in order to generate the bibliography I use the BibTeX style apsrev4-1.

The problem is that when I cite books, the book title does not break at the end of the column (nor the page in this case), as you might notice in the picture.

What could I do to solve this behaviour? Thank you.

MWE

\documentclass[twocolumn,aps,showpacs,showkeys,prd,superscriptaddress,byrevtex]{revtex4-1}

\usepackage{amsmath,amsthm,latexsym,amssymb,amsfonts,epsfig}
\usepackage{xcolor}
\usepackage{ulem}
%\usepackage{authblk}
\usepackage[%
  colorlinks=true,
  urlcolor=blue,
  linkcolor=blue,
  citecolor=blue
]{hyperref}
\usepackage{etoolbox}
\usepackage{breqn}

\makeatletter
\let\cat@comma@active\@empty
\makeatother

\begin{document}

\title{I'm here you're there}

\author{Oscar \surname{Castillo-Felisola}}

\section{\label{phenom}Phenomenological implications}

\cite{Cartan-Einstein,Cartan1922,*Cartan1923,*Cartan1924,*Cartan1925}

\bibliographystyle{apsrev4-1}
\bibliography{References.bib}
\end{document}

BibTeX entries

@Article{Cartan1922,
  author =   {Cartan, Elie},
  title =    {Sur une g\'en\'eralisation de la notion de courbure de Riemann et les espaces \`a torsion},
  journal =      {C. R. Acad. Sci. Paris},
  year =     {1922},
  volume =   {174},
  pages =    {593},
  url       =    {http://gallica.bnf.fr/ark:/12148/bpt6k3127j.image.langFR},
}

@article{Cartan1923,
  title={Sur les vari{\'e}t{\'e}s {\`a} connexion affine et la th{\'e}orie de la relativit{\'e} g{\'e}n{\'e}ralis{\'e}e (premi{\`e}re partie)},
  author={Cartan, Elie},
  journal={Ann. Ec. Norm. Super.},
  volume={40},
  pages={325},
  year={1923},
  organization={Soci{\'e}t{\'e} math{\'e}matique de France},
  url = "http://archive.numdam.org/article/ASENS_1923_3_40__325_0.pdf",
}

@article{Cartan1924,
  added-at = {2012-03-20T16:46:21.000+0100},
  author = {Cartan, Elie},
  biburl = {http://www.bibsonomy.org/bibtex/28d419192587558cbe5fb0ef3010fa947/marco.giovanell},
  interhash = {44a9d347ae2ea364f07c0e4e9cdcbfab},
  intrahash = {8d419192587558cbe5fb0ef3010fa947},
  journal = {Ann. Ec. Norm. Super.},
  keywords = {jabref:noKeywordAssigned},
  owner = {marco},
  pages = {1},
  timestamp = {2012-03-20T16:46:21.000+0100},
  title = {Sur les vari\'et\'es \`a connexion affine, et la th\'eorie de la relativit\'e
    g\'en\'eralis\'ee (premi\`ere partie) (Suite)},
  volume = {41},
  year = {1924},
  url = {http://www.numdam.org/numdam-bin/item?id=ASENS_1924_3_41__1_0},
}

@article{Cartan1925,
  added-at = {2012-03-20T16:46:21.000+0100},
  author = {Cartan, Elie},
  biburl = {http://www.bibsonomy.org/bibtex/2a42d27017aaeac461f63112c6604b814/marco.giovanell},
  interhash = {7b4e0980e917b55bf750d1c1fdee61c3},
  intrahash = {a42d27017aaeac461f63112c6604b814},
  journal = {Ann. Ec. Norm. Super.},
  keywords = {jabref:noKeywordAssigned},
  owner = {Marco},
  pages = {17},
  timestamp = {2012-03-20T16:46:21.000+0100},
  title = {Sur les vari\'et\'es \`a connexion affine et la th\'eorie de la relativit\'e
    g\'en\'eralis\'ee, Part II,},
  volume = {42},
  year = {1925},
  url = {http://www.numdam.org/numdam-bin/item?id=ASENS_1925_3_42__17_0},
}

@Book{Cartan-Einstein,
  editor =   {Debever, Robert},
  title =    {Elie Cartan - Albert Einstein Letters on Absolute Parallelism 1929-1932},
  publisher =    {Princeton University Press},
  year =     {1979},
}

Answer 1

ulem package is making an underline and preventing the title from being broken over a line in this context. Simply removing the package is simplest and then the title will be set in italics and break over a line with no issues.

Answer 2

The problem comes out from ulem as David Carlisle mentioned. It was certainly explained in the document.

ulem normally replaces italics with underlining in text emphasized by \emph, and to some extent by \em. A declaration of \normalem or the \usepackage option [normalem] disables this feature.

I solved this problem by using

\usepackage[normalem]{ulem}

instead of

\usepackage{ulem}