@article{AL_1985_24_2_a3,
     author = {D. P. Skvortsov},
     title = {A superintuitionistic propositional calculus},
     journal = {Algebra i logika},
     pages = {195--204},
     publisher = {mathdoc},
     volume = {24},
     number = {2},
     year = {1985},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/AL_1985_24_2_a3/}
}