DOPCHIE, J.; THOMAS, R. De werkgroepen van de Agesci. JORBEL - Belgian Journal of Operations Research, Statistics, and Computer Science, [S. l.], v. 2, n. 3, p. 15–26, 1961. Disponível em: https://www.orbel.be/jorbel/index.php/jorbel/article/view/516. Acesso em: 19 apr. 2024.