Holm Jakobsen, Bjarne. “Landslides = Glissements De Terrain: Proceedings of the 5. International Symposium on Landslides: 10-15 July 1988, Lausanne. Ed.: Christophe Bonnard. Vol. 1-3”. Geografisk Tidsskrift, bd. 89, januar 1989, https://tidsskrift.dk/geografisktidsskrift/article/view/44749.