1. Aleskerov, F., Bouyssou, D., Monjardet, B.: Utility Maximization, Choice and Preference, 2nd edn. Springer, Berlin (2007)
2. Stanford Studies in Mathematics and Statistics;HD Block,1960
3. Bosi, B., Candeal, J.C., Induráin, E., Oloriz, E., Zudaire, M.: Numerical representations of interval orders. Order 18(2), 171–190 (2001)
4. Bouchet, A.: Étude combinatoire des ordonnés finis. Applications. Thèse, Université Scientifique et Médicale de Grenoble, Grenoble, France (1981)
5. Bouyssou, D., Marchant, T.: Biorders with frontier. Order 28(1), 53–87 (2011)