1. Approximate solution of functional equations;Kantorovich;Uspekhi Mat. Nauk,1956
2. Nonlinear functional equations and continuous analogues of iterative methods;Gavurin;Izv. VUZov. Ser. Mat.,1958
3. Commutative Normalized Rings;Gel'fand,1960
4. Linear Operators;Dunford,1958
5. The problem of speeding up the convergence of iteration processes in the approximate solution of linear operational equations;Buledz;Dop. Akad. Nauk SSSR,1961