@article{MO_2024_110_2_a2,
     author = {S. V. Dvoryaninov and A. B. Mamkhegov},
     title = {Special math problems},
     journal = {Matemati\v{c}eskoe obrazovanie},
     pages = {19--21},
     publisher = {mathdoc},
     volume = {110},
     number = {2},
     year = {2024},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MO_2024_110_2_a2/}
}