@TechReport{Bier94,
author = {Michel Bierlaire },
title = {HieLoW: un logiciel d'estimation de mod\`eles logit embo\^{\i}t\'es},
institution = {Ecole Polytechnique F\'ed\'erale de Lausanne},
number = {cahiers du MET 5:69-87},
year = {1994}
}