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@article{MZM_2014_95_1_a13, author = {A. V. Ustinov}, title = {On the {Three-Dimensional} {Vahlen} {Theorem}}, journal = {Matemati\v{c}eskie zametki}, pages = {154--156}, publisher = {mathdoc}, volume = {95}, number = {1}, year = {2014}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/MZM_2014_95_1_a13/} }
A. V. Ustinov. On the Three-Dimensional Vahlen Theorem. Matematičeskie zametki, Tome 95 (2014) no. 1, pp. 154-156. http://geodesic.mathdoc.fr/item/MZM_2014_95_1_a13/