1. Fixed point theorems for families of contraction mappings;Belluce;Pacific J. Math.,1966
2. On the center of a convex set;Brodskii;Dokl. Akad. Nauk SSSR (M. S.),1948
3. The solvability of nonlinear functional equations;Browder;Duke Math. J.,1963
4. Variational boundary value problems for quasilinear elliptic equations of arbitrary order;Browder,1963
5. Variational boundary value problems for quasilinear elliptic equations. II;Browder,1963