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@article{DAN_1958_118_3_a15, author = {M. L. Tsetlin}, title = {Composition and subdivision of non-primitive circuits}, journal = {Doklady Akademii Nauk}, pages = {488--491}, publisher = {mathdoc}, volume = {118}, number = {3}, year = {1958}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DAN_1958_118_3_a15/} }
M. L. Tsetlin. Composition and subdivision of non-primitive circuits. Doklady Akademii Nauk, Tome 118 (1958) no. 3, pp. 488-491. http://geodesic.mathdoc.fr/item/DAN_1958_118_3_a15/