Kellis, E., & Baltzopoulos, V. (1997). The effects of antagonist moment on the resultant knee joint moment during isokinetic testing of the knee extensors. European journal of applied physiology, 76(3), S. 253-259. doi:10.1007/s004210050244

Kellis, E., and V. Baltzopoulos. "The Effects of Antagonist Moment On the Resultant Knee Joint Moment During Isokinetic Testing of the Knee Extensors." European Journal of Applied Physiology 76, no. 3 (1997): S. 253-259.

Kellis, E., and V. Baltzopoulos. "The Effects of Antagonist Moment On the Resultant Knee Joint Moment During Isokinetic Testing of the Knee Extensors." European Journal of Applied Physiology 76.3 (1997): S. 253-259.