1. Aptech systems, 1994. Gauss User’s Manuals. Maple Valley
2. Confidence intervals to bound the value of time;Armstrong;Transportation Research,2001
3. Batley, R., Daly, A., 2003. Establishing equivalence between nested logit and hierarchical elimination-by-aspects choice models. In: Proceedings European Transport Conference, Strasbourg, October 2003
4. Discrete choice models with latent choice sets;Ben Akiva;International Journal of Research in Marketing,1995
5. Cantillo, V., 2004. Modelación de la Demanda Incorporando Umbrales Mínimos de Percepción y Valoración de Atributos. Ph.D. Thesis, Department of Transport Engineering, Pontificia Universidad Católica de Chile, Santiago (in Spanish)