@article{AL_1978_17_2_a1,
     author = {A. N. Degtev},
     title = {Decidability of the $\forall \exists $-theory of a certain},
     journal = {Algebra i logika},
     pages = {134--143},
     publisher = {mathdoc},
     volume = {17},
     number = {2},
     year = {1978},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/AL_1978_17_2_a1/}
}