Hickson, R.C. (1980). "Interference of strength development by simultaneously training for strength and endurance over a long period". European Journal of Applied Physiology and Occupational Physiology. 45 (2–3). Springer Verlag: 255–63. doi:10.1007/BF00421333. PMID7193134. S2CID22934619.
Hickson, R.C. (1980). "Interference of strength development by simultaneously training for strength and endurance over a long period". European Journal of Applied Physiology and Occupational Physiology. 45 (2–3). Springer Verlag: 255–63. doi:10.1007/BF00421333. PMID7193134. S2CID22934619.
Hickson, R.C. (1980). "Interference of strength development by simultaneously training for strength and endurance over a long period". European Journal of Applied Physiology and Occupational Physiology. 45 (2–3). Springer Verlag: 255–63. doi:10.1007/BF00421333. PMID7193134. S2CID22934619.