@article{AL_2013_52_3_a2,
     author = {S. A. Drobyshevich},
     title = {Composition of an intuitionistic negation and negative modalities as a~necessity operator},
     journal = {Algebra i logika},
     pages = {305--331},
     publisher = {mathdoc},
     volume = {52},
     number = {3},
     year = {2013},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/AL_2013_52_3_a2/}
}