Geodesic
The preservation of elementary and universal equivalence in the
Algebra i logika, Tome 7 (1968) no. 4, pp. 114-119.

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

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     author = {E. I. Timoshenko},
     title = {The preservation of elementary and universal equivalence in the},
     journal = {Algebra i logika},
     pages = {114--119},
     publisher = {mathdoc},
     volume = {7},
     number = {4},
     year = {1968},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/AL_1968_7_4_a6/}
}
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E. I. Timoshenko. The preservation of elementary and universal equivalence in the. Algebra i logika, Tome 7 (1968) no. 4, pp. 114-119. http://geodesic.mathdoc.fr/item/AL_1968_7_4_a6/