DREBEN, BURTON THE DECISION PROBLEM : SOLVABLE CLASSES OF QUANTIFICATIONAL FORMULAS - S.E. - Estados Unidos ADDISON - WESLEY 1979 READING - 271 ISBN: 020102540X LCCN: 83041 Subjects--Topical Terms: CALCULO DE PREDICADOSINSOLUBILIDAD (LOGICA MATEMATICA) Dewey Class. No.: 511.3