@Book{BVPB20110086343, title = "De summo bono libri tres ", author = "Isidor, , de Sevilla, sant, ca. 560-636", publisher = "Lyptzck [Leipzig] : per Arnoldum de Colonia", editor = "per Arnoldum de Colonia", URL = "https://bvpb.mcu.es/es/consulta/registro.do?id=449427", year = "1492", }