Ulrich, G., Bärtsch, P., & Friedmann-Bette, B. (2011). Total haemoglobin mass and red blood cell profile in endurance-trained and non-endurance-trained adolescent athletes. European journal of applied physiology, 111(11), S. 2855-2864. doi:10.1007/s00421-011-1920-5

Ulrich, Gert, Peter Bärtsch, and Birgit Friedmann-Bette. "Total Haemoglobin Mass and Red Blood Cell Profile in Endurance-trained and Non-endurance-trained Adolescent Athletes." European Journal of Applied Physiology 111, no. 11 (2011): S. 2855-2864.

Ulrich, Gert, Peter Bärtsch, and Birgit Friedmann-Bette. "Total Haemoglobin Mass and Red Blood Cell Profile in Endurance-trained and Non-endurance-trained Adolescent Athletes." European Journal of Applied Physiology 111.11 (2011): S. 2855-2864.