@article{AL_1964_3_5_a2,
     author = {V. F. Kostyrko},
     title = {The reduction-class $\forall \exists ^n\forall $},
     journal = {Algebra i logika},
     pages = {45--55},
     publisher = {mathdoc},
     volume = {3},
     number = {5},
     year = {1964},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/AL_1964_3_5_a2/}
}