Effects of training and competition on the sleep of elite athletes: a systematic review and meta-analysis
Author: Roberts, Spencer Stuart Haines.  Published in: British Journal of Sports Medicine, v. 53  no. 8, pp. 513- 522  Date: 2019
ISSN:  0306-3674,  EISSN:  1473-0480  DOI:  10.1136/bjsports-2018-099322