Kramer, J., Morrow, A., & Leger, A. (1993). Changes in rowing ergometer, weight lifting, vertical jump and isokinetic performance in response to standard and standard plus plyometric training programs. International journal of sports medicine, 14(8), S. 449-454. doi:10.1055/s-2007-1021209

Kramer, J.F., A. Morrow, and A. Leger. "Changes in Rowing Ergometer, Weight Lifting, Vertical Jump and Isokinetic Performance in Response to Standard and Standard Plus Plyometric Training Programs." International Journal of Sports Medicine 14, no. 8 (1993): S. 449-454.

Kramer, J.F., A. Morrow, and A. Leger. "Changes in Rowing Ergometer, Weight Lifting, Vertical Jump and Isokinetic Performance in Response to Standard and Standard Plus Plyometric Training Programs." International Journal of Sports Medicine 14.8 (1993): S. 449-454.