Ruhli, F.J.; Henneberg, M. (2010). »Charlemagne was very tall, but not robust«. Economics and Human Biology. Zv. 8. str. 289–290. doi:10.1016/j.ehb.2009.12.005. ISSN1570-677X.
Ruhli, F.J.; Henneberg, M. (2010). »Charlemagne was very tall, but not robust«. Economics and Human Biology. Zv. 8. str. 289–290. doi:10.1016/j.ehb.2009.12.005. ISSN1570-677X.