@article{FPM_2000_6_4_a13,
     author = {M. V. Patlasov},
     title = {Propositional formulas closed in the~minimal calculus},
     journal = {Fundamentalʹna\^a i prikladna\^a matematika},
     pages = {1155--1191},
     publisher = {mathdoc},
     volume = {6},
     number = {4},
     year = {2000},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/FPM_2000_6_4_a13/}
}