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@article{DM_1998_10_2_a8, author = {V. A. Orlov}, title = {On strongly essential systems of functions in $P_k$}, journal = {Diskretnaya Matematika}, pages = {120--127}, publisher = {mathdoc}, volume = {10}, number = {2}, year = {1998}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DM_1998_10_2_a8/} }
V. A. Orlov. On strongly essential systems of functions in $P_k$. Diskretnaya Matematika, Tome 10 (1998) no. 2, pp. 120-127. http://geodesic.mathdoc.fr/item/DM_1998_10_2_a8/