1. Nonlinear elliptic boundary value problems;Browder;Bull. Am. Math. Soc.,1963
2. On a “monolonicity” method for the solution of nonlinear equations in Banach space;Minty,1965
3. F. E. Browder. Fixed point theorems for noncompact mappings in Hilbert space (to appear).
4. C. R. De Prima. Contractive and weakly contractive mappings in Hilbert space (to appear).
5. Two observations about the method of successive approximations;Krasnoselsky;Usp. Mat. Nauk,1955