@article{ZNSL_1978_75_a4,
     author = {Z. I. Borevich and V. Venslav and \'E. Dobrovol'skii and V. I. Rodionov},
     title = {The number of labeled topologies on nine points},
     journal = {Zapiski Nauchnykh Seminarov POMI},
     pages = {35--42},
     publisher = {mathdoc},
     volume = {75},
     year = {1978},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZNSL_1978_75_a4/}
}