DENMAN, H. Organist Alphonse Kerckhoffs. Historisk Årbog for Roskilde Amt, [S. l.], v. 1, n. 1, 2019. Disponível em: https://tidsskrift.dk/historiskaarbogforroskildeamt/article/view/112022. Acesso em: 6 maj. 2024.