@article{AL_2022_61_6_a4,
     author = {A. A. Onoprienko},
     title = {Cardinality reduction theorem for logics ${\mathrm{QHC}}$ and ${\mathrm{QH4}}$},
     journal = {Algebra i logika},
     pages = {720--741},
     publisher = {mathdoc},
     volume = {61},
     number = {6},
     year = {2022},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/AL_2022_61_6_a4/}
}