 Amari, S. 

 Amari, S.  Four Types of Learning Curves  1992 
 Ito, H.  Identifiability of Hidden Markov Information Sources and their Minimum Degrees of Freedom  March 1992 
 Amari, S.  Information Geometry of the EM and em Algorithms for Neural Networks  1994 
 Amari, S.  The EM algorithm and Information geometry in neural network learning  January 1995 
