“Science and non-science: the search for a demarcation criterion in the 20th century” (2011) Tydskrif vir Christelike Wetenskap | Journal for Christian Scholarship, 47(1), pp. 63–79. Available at: https://pubs.ufs.ac.za/index.php/tcw/article/view/252 (Accessed: 15 June 2026).