Raath, A. W. G. “Natural Law and Divine Law: Ulrich Huber and the Lutheran Legacy of Justice”. Tydskrif Vir Christelike Wetenskap | Journal for Christian Scholarship, vol. 44, no. 3 - 4, June 2008, pp. 27-58, https://pubs.ufs.ac.za/index.php/tcw/article/view/150.