@article{MZM_1971_9_3_a4,
     author = {A. D. Korshunov},
     title = {Number of nonisomorphic subgraphs in an $n$-point graph},
     journal = {Matemati\v{c}eskie zametki},
     pages = {263--273},
     publisher = {mathdoc},
     volume = {9},
     number = {3},
     year = {1971},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_1971_9_3_a4/}
}