Uzdzicki, A.; Malas, M.; Przybylski, T.; Turoń-Skrzypińska, A.; Szylinska, A.; Ciosek, Z.; Ptak, M.; Dutkiweicz, G.; Rotter, I. Selected Metabolic Changes After Extreme Endurance Physical Exercise by the Example of Marathon and Ultra - Marathon Runners. J Educ Health Sport 2018, 8, 662-672.