Vaso, M., Knechtle, B., Rüst, C.A., Rosemann, T. and Lepers, R. 2013. Age of peak swim speed and sex difference in performance in medley and freestyle swimming: A comparison between 200 m and 400 m in Swiss elite swimmers. Journal of Human Sport and Exercise. 8, 4 (Dec. 2013), 954–965. DOI:https://doi.org/10.4100/jhse.2013.84.06.