Liber 4, Tractatus 1-2,7 - Ulrich : von Strassburg, <1225-1277>. (OLS)http://semarc/name/573; Pieperhoff, Sabina. (OLS)http://semarc/name/17862 (De summo bono, 1987)
Keywords: Filosofia medievale. (OLS)http://semarc/subject/852