Variational methods for boundary value problems for systems of elliptic equations - Lavrent'ev, Mikhail Alekseevich 1900-1980; Radok, Jens Rainer Maria 1920-2004 (New York : Dover Publications, Inc., 1989)
Keywords: CALCULO DE VARIACIONES; APLICACIONES CONFORMES; PROBLEMAS DE VALORES DE FRONTERA; DINAMICA DE FLUIDOS