Herger, C. 2021. The Scientist Son of Keyle: Hans Kelsen’s oeuvre by Thomas Olechowski. Díké - Journal of Dezső Márkus Research Group for Comparative Legal History. 4, 2 (Mar. 2021), 140–147. DOI:https://doi.org/10.15170/DIKE.2020.04.02.10.