STOKER, P. H. Wat is Tyd?. Tydskrif vir Christelike Wetenskap | Journal for Christian Scholarship, [S. l.], v. 44, n. 3 - 4, p. 89–113, 2008. Disponível em: https://pubs.ufs.ac.za/index.php/tcw/article/view/152. Acesso em: 18 sep. 2025.