Cempla, J., & Szopa, J. (1985). Decrease of maximum oxygen consumption in men and women during the fourth to sixth decades of life, in the light of cross-sectional studies of Cracow population. Biology of sport, 2(1), S. 45-59.

Cempla, J., and J. Szopa. "Decrease of maximum oxygen consumption in men and women during the fourth to sixth decades of life, in the light of cross-sectional studies of Cracow population." Biology of sport 2, no. 1 (1985): S. 45-59.

Cempla, J., and J. Szopa. "Decrease of maximum oxygen consumption in men and women during the fourth to sixth decades of life, in the light of cross-sectional studies of Cracow population." Biology of sport 2.1 (1985): S. 45-59.