X-Curve Series
http://www.youtube.com/watch?v=TK2FSQNXdFM
Ole Einar Björndalen roller skiing
https://www.youtube.com/watch?v=brSNajuAbyE&feature=youtu.be
Interview Fredrik Lindström and Ole Einar Björndalen
http://www.svt.se/sport/stjarnornas-speciella-skidstavar
Secret of fast finnish Formula 1 drivers
https://www.youtube.com/watch?v=HP6gKchpwp4&feature=youtu.be