Recursive functions of context free languages (I) - The definitions of CFPRF and CFRF. - YunMei Dong (Sci. China Ser. F Inf. Sci., 2002)

Recursive functions of context free languages (II) - Validity of CFPRF and CFRF definitions. - YunMei Dong (Sci. China Ser. F Inf. Sci., 2002)

Linear algorithm for lexicographic enumeration of CFG parse trees. - YunMei Dong (Sci. China Ser. F Inf. Sci., 2009)