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@article{IVM_1987_7_a9, author = {Yu. V. Trubnikov}, title = {The {Hanner} inequality and the convergence of iterative processes}, journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika}, pages = {57--64}, publisher = {mathdoc}, number = {7}, year = {1987}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/IVM_1987_7_a9/} }
Yu. V. Trubnikov. The Hanner inequality and the convergence of iterative processes. Izvestiâ vysših učebnyh zavedenij. Matematika, no. 7 (1987), pp. 57-64. http://geodesic.mathdoc.fr/item/IVM_1987_7_a9/