"Mathematics education Education and instruction in mathematics Teaching problem solving and heuristic strategies." . . "Mathematics education Instructional exposition (textbooks, tutorial papers, etc.)" . . "Moskovskai︠a︡ matematicheskai︠a︡ olimpiada." . . . "Moskovskaia matematicheskaia olimpiada." . "General General and miscellaneous specific topics Problem books." . . "Beweis." . . "Moskau." . . "Problemes i exercicis." . . "General General and miscellaneous specific topics Recreational mathematics." . . "Beispielsammlung." . . "Mathematisches Problem." . . "Matemàtica." . . "Mathématiques Problèmes et exercices." . . "Internationale Mathematik-Olympiade." . . . . . . . . . . . . . . . . . "Problems and exercises" . . . "Moskovskaia matematicheskaia olimpiada" . . . . . . . . . . . "Beispielsammlung" . . . . "Moscow Mathematical Olympiads, 2000-2005" . "American Mathematical Society." . .