Siek, S., Kowalski, J., Terelak, J., & Walewska, J. (1986). The influence of practicing yoga on the dimensions of anxiety and aggression. Biology of sport, 3(3/4), S. 207-213.

Siek, S., J. Kowalski, J. Terelak, and J. Walewska. "The influence of practicing yoga on the dimensions of anxiety and aggression." Biology of sport 3, no. 3/4 (1986): S. 207-213.

Siek, S., J. Kowalski, J. Terelak, and J. Walewska. "The influence of practicing yoga on the dimensions of anxiety and aggression." Biology of sport 3.3/4 (1986): S. 207-213.