@article{ZNSL_1983_132_a3,
     author = {Z. I. Borevich and N. A. Vavilov},
     title = {On definition of the net subgroup},
     journal = {Zapiski Nauchnykh Seminarov POMI},
     pages = {26--33},
     publisher = {mathdoc},
     volume = {132},
     year = {1983},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZNSL_1983_132_a3/}
}