https://www.365mountainbike.com/news-mtb/1919-3-trail-building-school-imba-italia-in-val-di-sole.html
Potrebbe anche interessarti
http://mountainbike.bicilive.it/eventi/eventi-news/audioshow-primo-trail-building-school-imba-italia/
http://www.4mtbike.it/2015/04/02/imba-sondaggio-europeo-sulle-abitudini-dei-biker/
18/02/2015 IMBA Europe – http://www.imba-europe.org/events/trail-building-school-porretta-terme
https://www.imba.com/blog/mark-mcclure/imba-italia-trail-building-school