@article{VMUMM_1984_5_a2,
     author = {A. D. Yashin},
     title = {Nishimura's formulas as one-place logical connectives in the elementary theory of {Kripke} models},
     journal = {Vestnik Moskovskogo universiteta. Matematika, mehanika},
     pages = {12--15},
     publisher = {mathdoc},
     number = {5},
     year = {1984},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/VMUMM_1984_5_a2/}
}