ZANDEN, J.L. van. I.J. Blanken, De ontwikkeling van de N.V. Philips’ gloeilampenfabrieken tot elektrotechnisch concern 1922-1934. BMGN - Low Countries Historical Review, [S. l.], v. 109, n. 4, p. 687–688, 1994. DOI: 10.18352/bmgn-lchr.3938. Disponível em: https://bmgn-lchr.nl/article/view/URN%3ANBN%3ANL%3AUI%3A10-1-104531.. Acesso em: 19 jul. 2024.