Liber 4, Tractatus 2,15-24 - Ulrich : von Strassburg, <1225-1277>. (OLS)http://semarc/name/573; Mojsisch, Burkhard, <1944- >. (OLS)http://semarc/name/139; Sturlese, Loris, <1948- >. (OLS)http://semarc/name/137; Retucci, Fiorella, <1979- >. (OLS)http://semarc/name/42327 (De summo bono, 2008)