@article{articlef42f1b99,
title   = {Non-linear boundary element formulation applied to contact analysis using tangent operator},
author = {Leonel, Edson Denner and Venturini, Wilson Sérgio},
year = {2011},
doi = {10.1016/j.enganabound.2011.06.005},
journal   = {Engineering Analysis with Boundary Elements}
}