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@article{AL_1992_31_5_a2, author = {S. I. Mardaev}, title = {Fixed points of modal schemes}, journal = {Algebra i logika}, pages = {493--498}, publisher = {mathdoc}, volume = {31}, number = {5}, year = {1992}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/AL_1992_31_5_a2/} }
S. I. Mardaev. Fixed points of modal schemes. Algebra i logika, Tome 31 (1992) no. 5, pp. 493-498. http://geodesic.mathdoc.fr/item/AL_1992_31_5_a2/