1. On certain approximate methods in the solution of nonlinear equations involving unbounded operators;Matryniuk;Izv. Vysh. Uch. Zav., Matematika,1966
2. Alternating direction iteration for mildly nonlinear elliptic difference equations;Douglas;Num. Math.,1961
3. On the convergence of the method of steepest descent for nonlinear equations;Vainberg;Sibir. Math. J.,1961
4. On the solution of nonlinear equations by the method of iteration;Yakovlev;Doklady Akad. Nauk, USSR,1964
5. Construction of fixed points of nonlinear mappings in Hilbert space;Browder;J. Math. Anal. Appl.,1967