STRAUSS, D. F. M. Is a Straight Line the Shortest Distance between two Points and does 2+2 equal 4?. Tydskrif vir Christelike Wetenskap | Journal for Christian Scholarship, [S. l.], v. 43, n. 3 - 4, p. 51–72, 2007. Disponível em: https://pubs.ufs.ac.za/index.php/tcw/article/view/128. Acesso em: 13 sep. 2025.