@article{ZVMMF_2001_41_6_a5,
     author = {O. V. Ushakova},
     title = {Nondegeneracy conditions for three-dimensional cells and a formula for the cell's volume},
     journal = {\v{Z}urnal vy\v{c}islitelʹnoj matematiki i matemati\v{c}eskoj fiziki},
     pages = {881--894},
     publisher = {mathdoc},
     volume = {41},
     number = {6},
     year = {2001},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZVMMF_2001_41_6_a5/}
}