@article{TVP_1975_20_2_a17,
     author = {V. A. Liskovets},
     title = {On the number of vertices of a~random acyclic digraph},
     journal = {Teori\^a vero\^atnostej i ee primeneni\^a},
     pages = {412--420},
     year = {1975},
     volume = {20},
     number = {2},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TVP_1975_20_2_a17/}
}