Skiers sketches

In a tight schedule until Friday, I found time to sketch a little further on my skiers series. From top left: Petter Northug, Therese Johaug and Marit Bjørgen. I'm having trouble drawing Bjørgen and Vibeke Skofterud (not shown).
Since it's International Women's Day, I thought I'd try to finish drawing Norwegian's four top women skiers, but I did not succeed. I will try to continue in the weekend, though.