@book{70877,
	author = {Ballesteros, Porfirio.},
	title = {Nonlinear dynamic and creep buckling of elliptical parabooloidal concrete shells},
	publisher = {Universidad Nacional Autónoma de México. Facultad de Ingeniería,},
	year = {1978},
	series = {UNAM. Sección de estructuras},
	address = {México, D. F. :}
}