 Miyano, S. 

 Shinohara, A.  Teachability in computational learning  1991 
 Maruyama, O.  Inferring a Tree from Walks  December 1991 
 Furuya, S.  Analogy is NPhard  1992 
 Miyano, S.  Which classes of elementary formal systems are polynomialtime learnable?  1992 
 Miyano, S.  Learning theory toward genome informatics  1993 
