@article{VTPMK_2018_4_a7,
     author = {I. A. Gorbunov},
     title = {Quasi-normal partners of modal logics {K4} and {GL}},
     journal = {Vestnik Tverskogo gosudarstvennogo universiteta. Seri\^a Prikladna\^a matematika},
     pages = {98--110},
     publisher = {mathdoc},
     number = {4},
     year = {2018},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/VTPMK_2018_4_a7/}
}