http://landeswettbewerb-mathematik.de (页面存档备份,存于互联网档案馆)) 香港數學競賽 (HKMO,HongKongMathematicsOlympiad, links with past papers: https://web.archive.org/web/20090129115028/http://www
Mathematical Olympiad (PDF). IMO. [2023-08-28]. (原始内容存档 (PDF)于2023-03-27). Tony Gardiner. Report on the 35th International Mathematical OlympiadHongKong: 8 –