@article{MZM_1978_23_6_a11,
     author = {A. N. Degtev},
     title = {$m${-Degrees} of supersets of simple sets},
     journal = {Matemati\v{c}eskie zametki},
     pages = {889--893},
     publisher = {mathdoc},
     volume = {23},
     number = {6},
     year = {1978},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_1978_23_6_a11/}
}