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+\bibitem[Singh, Rossi, and Sevaux(2013)]{doi:10.1080/0305215X.2012.687732}
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+ \eprint{http://dx.doi.org/10.1080/0305215X.2012.687732}.
+ \urlprefix\url{http://dx.doi.org/10.1080/0305215X.2012.687732}.