@article{MO_2002_20_1_a2,
     author = {A. N. Zemlyakov},
     title = {Optional course in algebra for high school students},
     journal = {Matemati\v{c}eskoe obrazovanie},
     pages = {9--35},
     publisher = {mathdoc},
     volume = {20},
     number = {1},
     year = {2002},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MO_2002_20_1_a2/}
}