@article{AL_1999_38_6_a2,
     author = {L. L. Maksimova},
     title = {Superintuitionistic logics and the projective {Beth} property},
     journal = {Algebra i logika},
     pages = {680--696},
     year = {1999},
     volume = {38},
     number = {6},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/AL_1999_38_6_a2/}
}