@article{MT_1989_12_a5,
     author = {A. U. Muravitskii},
     title = {Correspondence of proof-intuitionistic logic extensions to proof-logic extensions},
     journal = {Matemati\v{c}eskie trudy},
     pages = {104--120},
     publisher = {mathdoc},
     volume = {12},
     year = {1989},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MT_1989_12_a5/}
}