@article{AL_1967_6_1_a1,
     author = {V. P. Belkin},
     title = {On subgroups with summarized endomorphisms},
     journal = {Algebra i logika},
     pages = {9--14},
     publisher = {mathdoc},
     volume = {6},
     number = {1},
     year = {1967},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/AL_1967_6_1_a1/}
}