Claessens, A., Beunen, G., & Simons, J. (1986). Stability of Anthroposcopic and Anthropometric Estimates of Physique in Belgian Boys Followed Longitudinally From 13 To 18 Years of Age. Annals of Human Biology, 13(3), 235-244. https://doi.org/10.1080/03014468600008401 (Original work published 1986)