@article{IVM_2022_5_a2,
     author = {I. A. Gorbunov},
     title = {Theories in propositional logi{\cyrs} and the converse of substitution},
     journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika},
     pages = {33--41},
     publisher = {mathdoc},
     number = {5},
     year = {2022},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/IVM_2022_5_a2/}
}