1. Herbrich, R., Graepel, T., Obermayer, K.: Regression models for ordinal data: a machine learning approach. Technical Report TR-99/03, TU Berlin (1999)
2. Shashua, A., Levin, A.: Ranking with large margin principle: Two approaches. In: Neural Information and Processing Systems, NIPS (2002)
3. Mathieson, M.J.: Ordinal models for neural networks. In: Refenes, A., Abu-Mostafa, Y., Moody, J. (eds.) Neural Networks in Financial Engineering. World Scientific, Singapore (1995)
4. Lecture Notes in Artificial Intelligence;E. Frank,2001
5. Costa, M.: Probabilistic interpretation of feedforward network outputs, with relationships to statistical prediction of ordinal quantities. International Journal Neural Systems 7, 627–638 (1996)