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@article{AL_1969_8_1_a0, author = {M. K. Valiev}, title = {The complexity of the word problem for finitely presented groups}, journal = {Algebra i logika}, pages = {5--43}, publisher = {mathdoc}, volume = {8}, number = {1}, year = {1969}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/AL_1969_8_1_a0/} }
M. K. Valiev. The complexity of the word problem for finitely presented groups. Algebra i logika, Tome 8 (1969) no. 1, pp. 5-43. http://geodesic.mathdoc.fr/item/AL_1969_8_1_a0/