FLORIS, S. Vættelys. Varv, [S. l.], v. 1967, n. 4, p. 123–127, 1967. DOI: 10.7146/varv.v1967i4.151607. Disponível em: https://tidsskrift.dk/varv/article/view/151607. Acesso em: 8 jan. 2025.