@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/}
}