Lewicki, R., Tchorzewski, H., Denys, A., Kowalska, M., & Golinska, A. (1987). Effect of physical exercise on some parameters of immunity in conditioned sportsmen. International journal of sports medicine, 8(5), S. 309-314. doi:10.1055/s-2008-1025675

Lewicki, R., H. Tchorzewski, A. Denys, M. Kowalska, and A. Golinska. "Effect of Physical Exercise On Some Parameters of Immunity in Conditioned Sportsmen." International Journal of Sports Medicine 8, no. 5 (1987): S. 309-314.

Lewicki, R., et al. "Effect of Physical Exercise On Some Parameters of Immunity in Conditioned Sportsmen." International Journal of Sports Medicine 8.5 (1987): S. 309-314.