IMO 20142026·Problem sheet55th International Mathematical Olympiad. Cape Town, South Africa, 2014.0330
IMO 20172026·Problem sheet58th International Mathematical Olympiad. Rio de Janeiro, Brazil, 2017.0290
IMO 20082026·Problem sheet49th International Mathematical Olympiad. Madrid, Spain, 10-22 July 2008.0230
IMO 20122026·Problem sheet53rd International Mathematical Olympiad. Mar del Plata, Argentina, 2012.0290