%0 Journal Article %A MAURICIO AYALA-RINCÓN %T A deductive calculus for conditional equational system with built-in predicates as premisas %J Revista colombiana de matematicas %D 1997 %P 77-98 %V 31 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/item/RCM_1997_31_2_a2/ %F RCM_1997_31_2_a2