IPC (2013). "Nordic Skiing Classification". IPC Cross-Country Skiing and Biathlon. International Paralympic Committee. Retrieved 2014-10-04.
IPC (November 2013). "Nordic Skiing Rules and Regulations"(PDF). IPC Cross-Country Skiing and Biathlon. International Paralympic Committee. Archived from the original(PDF) on 2014-01-06. Retrieved 2014-10-04.
IPC (2013). "About the sport". IPC Cross-Country Skiing and Biathlon. International Paralympic Committee. Retrieved 2014-10-04.
IPC (November 2013). "Nordic Skiing Rules and Regulations"(PDF). IPC Cross-Country Skiing and Biathlon. International Paralympic Committee. Archived from the original(PDF) on 2014-01-06. Retrieved 2014-10-04.