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Taylor, H. L.; Buskirk, E. R.; BroŽek, J.; Anderson, J. T.; Grande, F. . (1957). <i>Performance Capacity and Effects of Caloric Restriction With Hard Physical Work on Young Men</i>. Journal of Applied Physiology, 10(3), 421–429. doi:10.1152/jappl.1957.10.3.421 
10.1152/jappl.1957.10.3.421