BUYST, E. Enkele bedenkingen bij de geschiedenis van Koninklijke Shell. BMGN - Low Countries Historical Review, [S. l.], v. 123, n. 3, p. 460–468, 2008. DOI: 10.18352/bmgn-lchr.6852. Disponível em: https://bmgn-lchr.nl/article/view/URN%3ANBN%3ANL%3AUI%3A10-1-107846. Acesso em: 24 oct. 2021.