@article{DAN_1974_219_6_a12,
     author = {N. N. Nepeivoda},
     title = {The language $\Delta$ with weak three-valued logic},
     journal = {Doklady Akademii Nauk},
     pages = {1325--1327},
     publisher = {mathdoc},
     volume = {219},
     number = {6},
     year = {1974},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1974_219_6_a12/}
}