Geodesic
On the Novikov groups
Algebra i logika, Tome 6 (1967) no. 1, pp. 25-38 
L. A. Bokut'. On the Novikov groups. Algebra i logika, Tome 6 (1967) no. 1, pp. 25-38. http://geodesic.mathdoc.fr/item/AL_1967_6_1_a3/
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     author = {L. A. Bokut'},
     title = {On the {Novikov} groups},
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     number = {1},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/AL_1967_6_1_a3/}
}
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Voir la notice de l'article provenant de la source Math-Net.Ru

It is proved that Novikov's groups are those with standard basis. With the aid of this theorem a new proof is given for the Novikov–Fridman theorem on the existence of finitely presented groups with a solvable word problem and an unsolvable conjugate one.