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@article{DA_1995_2_2_a4, author = {I. Mirchev}, title = {Strongly essential variables of functions of $k$-valued logic}, journal = {Diskretnyj analiz i issledovanie operacij}, pages = {62--68}, publisher = {mathdoc}, volume = {2}, number = {2}, year = {1995}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DA_1995_2_2_a4/} }
I. Mirchev. Strongly essential variables of functions of $k$-valued logic. Diskretnyj analiz i issledovanie operacij, Tome 2 (1995) no. 2, pp. 62-68. http://geodesic.mathdoc.fr/item/DA_1995_2_2_a4/