@article{DAN_1961_137_3_a3,
     author = {P. E. Dyubyuk},
     title = {On the number of subgroups of a finite abelian group},
     journal = {Doklady Akademii Nauk},
     pages = {506--508},
     publisher = {mathdoc},
     volume = {137},
     number = {3},
     year = {1961},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1961_137_3_a3/}
}