@article{AL_1977_16_6_a2,
     author = {L. L. Maksimova},
     title = {Craig's theorem in superintuitionistic logics and amalgamable},
     journal = {Algebra i logika},
     pages = {643--681},
     publisher = {mathdoc},
     volume = {16},
     number = {6},
     year = {1977},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/AL_1977_16_6_a2/}
}