Some classes of prolog programs inferable from positive data.

M. R. K. Krishna Rao Some classes of prolog programs inferable from positive data. 211-234 2000 241 Theor. Comput. Sci. 1-2 db/journals/tcs/tcs241.html#Rao00a http://dx.doi.org/10.1016/S0304-3975(99)00271-6