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@article{AL_1989_28_4_a6, author = {S. V. Sizyi}, title = {Critical theories of some classes of graphs and unary}, journal = {Algebra i logika}, pages = {454--462}, publisher = {mathdoc}, volume = {28}, number = {4}, year = {1989}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/AL_1989_28_4_a6/} }
S. V. Sizyi. Critical theories of some classes of graphs and unary. Algebra i logika, Tome 28 (1989) no. 4, pp. 454-462. http://geodesic.mathdoc.fr/item/AL_1989_28_4_a6/