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@article{IVM_1965_5_a6, author = {V. A. Dem'yanenko}, title = {On {Ye\'smanowicz'} problem for {Pythagorean} numbers}, journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika}, pages = {52--56}, publisher = {mathdoc}, number = {5}, year = {1965}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/IVM_1965_5_a6/} }
V. A. Dem'yanenko. On Ye\'smanowicz' problem for Pythagorean numbers. Izvestiâ vysših učebnyh zavedenij. Matematika, no. 5 (1965), pp. 52-56. http://geodesic.mathdoc.fr/item/IVM_1965_5_a6/