@misc{MO_2009_4_a5,
     title = {Editorial},
     journal = {Matemati\v{c}eskoe obrazovanie},
     pages = {69},
     year = {2009},
     number = {4},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MO_2009_4_a5/}
}