Sigg, K., Knechtle, B., Rüst, C. A., Knechtle, P., Lepers, R., & Rosemann, T. (2012). Central European triathletes dominate Double Iron ultratriathlon – analysis of participation and performance 1985–2011. Dove Medical Press.

Sigg, Katrin, Beat Knechtle, Christoph Alexander Rüst, Patrizia Knechtle, Romuald Lepers, and Thomas Rosemann. Central European Triathletes Dominate Double Iron Ultratriathlon – Analysis of Participation and Performance 1985–2011. Dove Medical Press, 2012.

Sigg, Katrin, et al. Central European Triathletes Dominate Double Iron Ultratriathlon – Analysis of Participation and Performance 1985–2011. Dove Medical Press, 2012.