@article{VMUMM_1997_4_a17,
     author = {S. A. Zaytsev},
     title = {An estimate for the number of groups with one relation that have corank $1$},
     journal = {Vestnik Moskovskogo universiteta. Matematika, mehanika},
     pages = {55--57},
     publisher = {mathdoc},
     number = {4},
     year = {1997},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/VMUMM_1997_4_a17/}
}