Leena Ristolainen, Ari Heinonen, Benjamin Waller, Urho M. Kujala, Jyrki A. Kettunen. (2009) Gender Differences in Sport Injury Risk and Types of Injuries: A Retrospective Twelve-Month Study on Cross-Country Skiers, Swimmers, Long-Distance Runners and Soccer Players. Journal of Sports Science and Medicine (08), 443 - 451.