@article{MO_2021_2_a7,
     author = {A. A. Andreev and E. A. Skorodumova and E. A. Maksimova},
     title = {School olympiad technologies},
     journal = {Matemati\v{c}eskoe obrazovanie},
     pages = {54--70},
     year = {2021},
     number = {2},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MO_2021_2_a7/}
}