INTERNATIONAL SCHOOL OF IUS COMMUNE 20TH. COURSE THE CITIES AND INSTITUTIONS OF MEDIEVAL EUROPE. FROM SICILY TO GERMANY. Erice, 7-14 de octubre de 1999
Bermúdez Aznar, Agustín (2000). INTERNATIONAL SCHOOL OF IUS COMMUNE 20TH. COURSE THE CITIES AND INSTITUTIONS OF MEDIEVAL EUROPE. FROM SICILY TO GERMANY. Erice, 7-14 de octubre de 1999. ANUARIO DE HISTORIA DEL DERECHO ESPAÑOL . pp. 704-706.
