@article{DAN_1963_151_5_a10,
     author = {V. A. Yankov},
     title = {On the realizable formulae of propositional logic},
     journal = {Doklady Akademii Nauk},
     pages = {1035--1037},
     publisher = {mathdoc},
     volume = {151},
     number = {5},
     year = {1963},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1963_151_5_a10/}
}