@article{DAN_1973_212_3_a7,
     author = {V. E. Plisko},
     title = {Realizable predicate formulae},
     journal = {Doklady Akademii Nauk},
     pages = {553--556},
     year = {1973},
     volume = {212},
     number = {3},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1973_212_3_a7/}
}