Kraemer, W. J., Dziados, J. E., Marchitelli, L. J., Gordon, S. E., Harman, E. A., Mello, R., . . . Triplett, N. T. (1993). Effects of different heavy-resistance exercise protocols on plasma beta-endorphin concentrations. Journal of applied physiology, 74(1), S. 450-459.

Kraemer, William J., Joseph E. Dziados, Louis J. Marchitelli, Scott E. Gordon, Everett A. Harman, Robert Mello, Steven J. Fleck, Peter N. Frykman, and N. Travis Triplett. "Effects of Different Heavy-resistance Exercise Protocols On Plasma Beta-endorphin Concentrations." Journal of Applied Physiology 74, no. 1 (1993): S. 450-459.

Kraemer, William J., et al. "Effects of Different Heavy-resistance Exercise Protocols On Plasma Beta-endorphin Concentrations." Journal of Applied Physiology 74.1 (1993): S. 450-459.