Knechtle, B., Nikolaidis, P. T., Onywera, V. O., Zingg, M. A., Rosemann, T., & Rüst, C. A. (2016). Male and female Ethiopian and Kenyan runners are the fastest and the youngest in both half and full marathon. Springerplus.

Knechtle, Beat, Pantelis T. Nikolaidis, Vincent O. Onywera, Matthias A. Zingg, Thomas Rosemann, ja Christoph A. Rüst. "Male and Female Ethiopian and Kenyan Runners Are the Fastest and the Youngest in Both Half and Full Marathon." Springerplus 2016.

Knechtle, Beat, et al. "Male and Female Ethiopian and Kenyan Runners Are the Fastest and the Youngest in Both Half and Full Marathon." Springerplus 2016.