TY - JOUR TI - Questions of the 12-th Summer Conference of Tournament of the Towns JO - Matematičeskoe obrazovanie PY - 2000 SP - 43 EP - 68 IS - 3 UR - http://geodesic.mathdoc.fr/item/MO_2000_3_a6/ LA - ru ID - MO_2000_3_a6 ER -