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@article{AL_1986_25_1_a1, author = {L. P. Lisovik}, title = {Quasirelations in a free group and problems of the equivalence}, journal = {Algebra i logika}, pages = {51--86}, publisher = {mathdoc}, volume = {25}, number = {1}, year = {1986}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/AL_1986_25_1_a1/} }
L. P. Lisovik. Quasirelations in a free group and problems of the equivalence. Algebra i logika, Tome 25 (1986) no. 1, pp. 51-86. http://geodesic.mathdoc.fr/item/AL_1986_25_1_a1/