Raath, A. W. G. “From the Corpus Christianum to the Respublica Christiana: The Theologico-Historical Integration of Magisterial Office and the Biblical Covenant in the Political Thought of the Magisterial Reformers (1519 – 1555)”. Tydskrif Vir Christelike Wetenskap | Journal for Christian Scholarship, vol. 40, no. 1 - 2, Jan. 2004, pp. 25-55, https://pubs.ufs.ac.za/index.php/tcw/article/view/24.