@article{TRSPY_1968_98_a3,
     author = {G. E. Mints},
     title = {Some calculi of modal logic},
     journal = {Informatics and Automation},
     pages = {88--111},
     publisher = {mathdoc},
     volume = {98},
     year = {1968},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TRSPY_1968_98_a3/}
}