@article{IVM_1966_4_a0,
     author = {\`E. \`E. Balash},
     title = {Determination of the number of non-isomorphic groups of order not divisible by a~square of a~prime number},
     journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika},
     pages = {3--8},
     publisher = {mathdoc},
     number = {4},
     year = {1966},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/IVM_1966_4_a0/}
}