Polynomial-Time Identification of an Extension of Very Simple Grammars from Positive Data.

Ryo Yoshinaka Polynomial-Time Identification of an Extension of Very Simple Grammars from Positive Data. 45-58 2006 conf/icgi/2006 ICGI http://dx.doi.org/10.1007/11872436_5 db/conf/icgi/icgi2006.html#Yoshinaka06