Exact bounds of denumerable collections of degrees of difficulty
Matematičeskie zametki, Tome 28 (1980) no. 6, pp. 899-910
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@article{MZM_1980_28_6_a8,
author = {E. Z. Dyment},
title = {Exact bounds of denumerable collections of degrees of difficulty},
journal = {Matemati\v{c}eskie zametki},
pages = {899--910},
publisher = {mathdoc},
volume = {28},
number = {6},
year = {1980},
language = {ru},
url = {http://geodesic.mathdoc.fr/item/MZM_1980_28_6_a8/}
}
E. Z. Dyment. Exact bounds of denumerable collections of degrees of difficulty. Matematičeskie zametki, Tome 28 (1980) no. 6, pp. 899-910. http://geodesic.mathdoc.fr/item/MZM_1980_28_6_a8/