Geodesic
The complexity of certain problems for groups and semigroups
Doklady Akademii Nauk, Tome 191 (1970) no. 5, pp. 989-992.

Voir la notice de l'article provenant de la source Math-Net.Ru

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     author = {Z. K. Litvintseva},
     title = {The complexity of certain problems for groups and semigroups},
     journal = {Doklady Akademii Nauk},
     pages = {989--992},
     publisher = {mathdoc},
     volume = {191},
     number = {5},
     year = {1970},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1970_191_5_a7/}
}
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Z. K. Litvintseva. The complexity of certain problems for groups and semigroups. Doklady Akademii Nauk, Tome 191 (1970) no. 5, pp. 989-992. http://geodesic.mathdoc.fr/item/DAN_1970_191_5_a7/