@article{BUMI_1949_3_4_4_a15, author = {Crenna, Mario}, title = {Estensione del {Teorema} di {Pitagora}}, journal = {Bollettino della Unione matematica italiana}, pages = {412--416}, publisher = {mathdoc}, volume = {Ser. 3, 4}, number = {4}, year = {1949}, zbl = {0035.36401}, language = {it}, url = {http://geodesic.mathdoc.fr/item/BUMI_1949_3_4_4_a15/} }