BibTex format
@article{Butenuth:1998,
author = {Butenuth, C and Frey, ML and de, Freitas MH and Passas, N and Forero-Duenas, CA},
journal = {Geohazards in Engineering Geology},
pages = {185--191},
title = {Silica gels: a possible explanation for slope failures in certain rocks},
year = {1998}
}