NUSSELDER, E. ’Investigare necesse est’. Bulletin KNOB, [S. l.], v. 89, n. 4, p. 1, 1990. DOI: 10.7480/knob.89.1990.4.523. Disponível em: https://bulletin.knob.nl/index.php/knob/article/view/Nusselder1. Acesso em: 5 mrt. 2024.