@article{AL_1976_15_2_a2,
     author = {L. L. Maksimova},
     title = {The principle of separation of variables in propositional logics},
     journal = {Algebra i logika},
     pages = {168--184},
     publisher = {mathdoc},
     volume = {15},
     number = {2},
     year = {1976},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/AL_1976_15_2_a2/}
}