@article{MO_2012_4_a1,
     author = {A. I. Sablin},
     title = {On {Inter{\textendash}Institution} {Mathematical} {Olympiad}},
     journal = {Matemati\v{c}eskoe obrazovanie},
     pages = {11--23},
     year = {2012},
     number = {4},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MO_2012_4_a1/}
}