@book{11480,
	author = {Summer School on Nonlinear Operators and the Calculus of Variations, Bruxelles, 8-19 Sept., 1975 and Gossez, U. P.},
	title = {Nonlinear operators and the calculus of variations},
	publisher = {Springer-Verlag,},
	year = {1976},
	address = {Berlin:}
}