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@article{AL_1968_7_3_a1, author = {M. K. Valiev}, title = {A theorem of {G.} {Higman}}, journal = {Algebra i logika}, pages = {9--22}, publisher = {mathdoc}, volume = {7}, number = {3}, year = {1968}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/AL_1968_7_3_a1/} }
M. K. Valiev. A theorem of G. Higman. Algebra i logika, Tome 7 (1968) no. 3, pp. 9-22. http://geodesic.mathdoc.fr/item/AL_1968_7_3_a1/