@article{AL_1968_7_2_a5,
     author = {L. L. Maksimova},
     title = {The calculus of strict implication},
     journal = {Algebra i logika},
     pages = {55--76},
     publisher = {mathdoc},
     volume = {7},
     number = {2},
     year = {1968},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/AL_1968_7_2_a5/}
}