@article{DAN_1969_184_6_a6,
     author = {V. A. Liskovets},
     title = {A recurrent method for the enumeration of graphs with labelled vertices},
     journal = {Doklady Akademii Nauk},
     pages = {1284--1287},
     year = {1969},
     volume = {184},
     number = {6},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1969_184_6_a6/}
}