@article{IM2_1978_12_3_a9,
     author = {V. E. Plisko},
     title = {Some variants of the notion of realizability for predicate formulas},
     journal = {Izvestiya. Mathematics },
     pages = {588--604},
     publisher = {mathdoc},
     volume = {12},
     number = {3},
     year = {1978},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/IM2_1978_12_3_a9/}
}