Raath, A. W. G. “The Quest for the Restoration of the Covenant and the Glory of Magistracy: Zurich and the Dutch Second Reformation”. Tydskrif Vir Christelike Wetenskap | Journal for Christian Scholarship, vol. 39, no. 3 - 4, Jan. 2003, pp. 1-30, https://pubs.ufs.ac.za/index.php/tcw/article/view/11.