J. de Bas, Hervormd op wielen. Wielerkampioen Cees Erkelens (1889-1959). BMGN - Low Countries Historical Review, [S. l.], v. 121, n. 3, p. 546–548, 2006. DOI: 10.18352/bmgn-lchr.6498. Disponível em: https://ojstest.minions.amsterdam/article/view/URN%3ANBN%3ANL%3AUI%3A10-1-107443.. Acesso em: 22 nov. 2024.