Andreescu, Titu Mathematical olympiad treasures Titu Andreescu and Bogadan Enescu - 2nd. ed. - New York Birkhauser 2011 - viii, 253p. ISBN: 9780817682521 Subjects--Index Terms: Mathematical olympiad Mathematics - Problems Mathematics - Exercises Enescu, Bogdan Universal Decimal Class. No.: 510:076.2 / AND