@TechReport{BierThem06,
author = {Michel Bierlaire and Michaël Th\'emans },
title = {Dealing with singularities in nonlinear unconstrained optimization},
institution = {Transport and Mobility Laboratory, Ecole Polytechnique F\'ed\'erale de Lausanne},
number = {TRANSP-OR 061207},
note = {Published as Bierlaire, M., and Th\'emans, M. (2009). Dealing with singularities in nonlinear unconstrained optimization, European Journal of Operational Research196(1):33-42},
year = {2006}
}