@article{ref1,
title="Improvement of analytical factor of safety estimation of falling failure mode in roof wedge stability",
journal="International journal of rock mechanics and mining sciences",
year="2018",
author="Napa-García, G. F. and Santos, R. A. and Beck, A. T. and Celestino, T. B.",
volume="103",
number="",
pages="116-122",
abstract="<p>[Abstract unavailable]</p> <p>Language: en</p>",
language="en",
issn="1365-1609",
doi="10.1016/j.ijrmms.2018.01.002",
url="http://dx.doi.org/10.1016/j.ijrmms.2018.01.002"
}