New roller ski track set to boost biathlon and cross-country in Switzerland
US cross country ski racer Katharine Ogden tucks while racing downhill in a ROLLER SKI RACE, Craftsbury Outdoor Center, Vermont, USA Stock Photo - Alamy
How to Choose Cross-Country Ski Gear – Cross Country Nova Scotia
Beginner's Guide: The Season of Roller-Skiing – FasterSkier.com
RollerSafe Sitski - Roller ski with brakes - SMART BRAKE
Developing longer glide while skating on roller skiing - Part 1 - YouTube
Not quite the Whistler Dave Murray downhill course