@article{VMUMM_1986_1_a3,
     author = {V. N. Perfilova},
     title = {On the number of transversal matroids},
     journal = {Vestnik Moskovskogo universiteta. Matematika, mehanika},
     pages = {13--15},
     year = {1986},
     number = {1},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/VMUMM_1986_1_a3/}
}