@article{AL_1966_5_6_a3,
     author = {L. L. Maksimova},
     title = {Formal deductions in the calculus of strict implication},
     journal = {Algebra i logika},
     pages = {33--39},
     publisher = {mathdoc},
     volume = {5},
     number = {6},
     year = {1966},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/AL_1966_5_6_a3/}
}