@article{AL_1978_17_4_a5,
     author = {V. V. Rybakov},
     title = {Modal logics with ${\rm LM}$-axioms},
     journal = {Algebra i logika},
     pages = {455--467},
     publisher = {mathdoc},
     volume = {17},
     number = {4},
     year = {1978},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/AL_1978_17_4_a5/}
}