@article{MO_2023_3_a4,
     author = {G. A. Oganesyan and E. M. Dzhambetov and A. Ya. Belov},
     title = {Some non-standard logic problems},
     journal = {Matemati\v{c}eskoe obrazovanie},
     pages = {27--34},
     year = {2023},
     number = {3},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MO_2023_3_a4/}
}