EHRENSPERGER, L.; KNECHTLE, B.; RÜST, C. A.; ROSEMANN, T. Participation and performance trends in 6-hour ultra-marathoners: A retrospective data analysis of worldwide participation from 1991-2010. Journal of Human Sport and Exercise, [S. l.], v. 8, n. 4, p. 905–924, 2013. DOI: 10.4100/jhse.2013.84.03. Disponível em: https://www.jhse.ua.es/article/view/2013-v8-n4-participation-and-performance-trends-in-6-hour-ultra-. Acesso em: 16 jun. 2024.