Hansen, B. (1987) “Climatic changes on a yearly to Millennial Basis: geological, historical and instrumental records: proceedings of the second Nordic symposium on climatic changes and related problems, held in Stockholm, Sweden, May 16-20, 1983. Ed. by N.-A. Morner and W. Karlen. Reidel, Dordrecht 1984.”, Geografisk Tidsskrift, 87. Tilgængelig hos: https://tidsskrift.dk/geografisktidsskrift/article/view/44458 (Set: 25februar2021).