Determinants of maximal whole-body fat oxidation in elite cross-country skiers: Role of skeletal muscle mitochondria - Dandanell, S.; Meinild-Lundby, A.-K.; Andersen, A. B.; Lang, P. F.; Oberholzer, L.; Keiser, S.; Robach, P.; Larsen, S. (Scandinavian Journal of Medicine & Science in Sports, 2018)