VIJGEN, Jörgen. In memoriam Leo J. Elders S.V.D. Sapientia, [S. l.], v. 74, n. 244, p. 209–220, 2021. Disponível em: https://200.16.86.39/index.php/SAP/article/view/3378. Acesso em: 14 ago. 2025.