Study of some physical properties of biodegradable films based on blends of gelatin and poly(vinyl alcohol) using a response surface methodology - Maria, T. M. C.; Carvalho, Rosemary Aparecida de; Moraes, I. C. F.; Bergo, Paulo Victor Albuquerque; Kamimura, Eliana Setsuko; Bittante, Ana Mônica Quinta Barbosa; Sobral, Paulo José do Amaral (French-Brazilian Meeting on Polymers, 2008)