CAVALLAR, Osvaldo; DEGENRING, Susanne y KISCHNER, Julius: A Grammar of Signs. Bartolo da Sassolerrato´s Tract on Insignia and Coats of Arms, Berkeley (Ca.), University of California -Robbins Collection (= Studies in Comparative Legal History), 1994; xv+200 pp.v+200 pp.
Petit Calvo, Carlos. "CAVALLAR, Osvaldo; DEGENRING, Susanne y KISCHNER, Julius: A Grammar of Signs. Bartolo da Sassolerrato´s Tract on Insignia and Coats of Arms, Berkeley (Ca.), University of California -Robbins Collection (= Studies in Comparative Legal History), 1994; xv+200 pp.v+200 pp.". ANUARIO DE HISTORIA DEL DERECHO ESPAÑOL. 1996. pp. 1157-1159.
