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@article{MZM_1991_50_3_a8, author = {I. V. Kuku}, title = {The cardinality of parametric bases in chain logics}, journal = {Matemati\v{c}eskie zametki}, pages = {68--75}, publisher = {mathdoc}, volume = {50}, number = {3}, year = {1991}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/MZM_1991_50_3_a8/} }
I. V. Kuku. The cardinality of parametric bases in chain logics. Matematičeskie zametki, Tome 50 (1991) no. 3, pp. 68-75. http://geodesic.mathdoc.fr/item/MZM_1991_50_3_a8/