Jovanovič, Mladen; Gaudenyi, Tivadar; O'Hara-Dhand, Ken; Smalley, Ian (2014). "Karl Caesar von Leonhard (1779–1862), and the beginnings of loess research in the Rhine valley". Quaternary International. 334–335: 4–9. Bibcode:2014QuInt.334....4J. doi:10.1016/j.quaint.2013.02.003.
Jovanovič, Mladen; Gaudenyi, Tivadar; O'Hara-Dhand, Ken; Smalley, Ian (2014). "Karl Caesar von Leonhard (1779–1862), and the beginnings of loess research in the Rhine valley". Quaternary International. 334–335: 4–9. Bibcode:2014QuInt.334....4J. doi:10.1016/j.quaint.2013.02.003.