Hickson, R.C. Interference of strength development by simultaneously training for strength and endurance over a long period. European Journal of Applied Physiology and Occupational Physiology (Springer Verlag). 1980, 45 (2–3): 255–263. PMID 7193134. doi:10.1007/BF00421333.
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Hickson, R.C. Interference of strength development by simultaneously training for strength and endurance over a long period. European Journal of Applied Physiology and Occupational Physiology (Springer Verlag). 1980, 45 (2–3): 255–263. PMID 7193134. doi:10.1007/BF00421333.