@misc{MO_1999_a5,
     title = {The {Tournament} of the {Towns'} 11-th {Summer} {Conference} {Problems}},
     journal = {Matemati\v{c}eskoe obrazovanie},
     pages = {122--149},
     publisher = {mathdoc},
     year = {1999},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MO_1999_a5/}
}