@article{CHEB_2021_22_1_a28,
     author = {N. N. Konstantinov and A. L. Semenov},
     title = {Productive education in the mathematical school},
     journal = {\v{C}eby\v{s}evskij sbornik},
     pages = {413--446},
     publisher = {mathdoc},
     volume = {22},
     number = {1},
     year = {2021},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/CHEB_2021_22_1_a28/}
}