@article{DAN_1964_157_3_a8,
     author = {N. M. Nagornyi},
     title = {On realizable and fulfillable logical-arithmetical formulae},
     journal = {Doklady Akademii Nauk},
     pages = {529--531},
     publisher = {mathdoc},
     volume = {157},
     number = {3},
     year = {1964},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1964_157_3_a8/}
}