RASMUSSEN, H. W. Hatformede bakker. Varv, [S. l.], v. 1968, n. 1, p. 2–8, 1968. DOI: 10.7146/varv.v1968i1.151439. Disponível em: https://tidsskrift.dk/varv/article/view/151439. Acesso em: 8 jan. 2025.