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@article{AL_1982_21_3_a2, author = {M. F. Ra\c{t}\u{a}}, title = {Nontabularity of the logic ${\rm S}4$ with respect to}, journal = {Algebra i logika}, pages = {283--320}, publisher = {mathdoc}, volume = {21}, number = {3}, year = {1982}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/AL_1982_21_3_a2/} }
M. F. Raţă. Nontabularity of the logic ${\rm S}4$ with respect to. Algebra i logika, Tome 21 (1982) no. 3, pp. 283-320. http://geodesic.mathdoc.fr/item/AL_1982_21_3_a2/