@article{DAN_1963_150_4_a2,
     author = {V. V. Vishin},
     title = {Identity transformations in a four-valued logic},
     journal = {Doklady Akademii Nauk},
     pages = {719--721},
     year = {1963},
     volume = {150},
     number = {4},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1963_150_4_a2/}
}