@article{AL_2015_54_1_a2,
     author = {A. K. Koshcheeva},
     title = {A new constant in superintuitionistic logic~$L3$},
     journal = {Algebra i logika},
     pages = {34--52},
     publisher = {mathdoc},
     volume = {54},
     number = {1},
     year = {2015},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/AL_2015_54_1_a2/}
}