Bojsen Christensen, K. M., H. McGovern, T., Buckland, P., Perry, D. W., Einarsson, B., Snæsdóttir, M., Sveinbjamardóttir, G., Vilhjàlmsson, V. Örn, Arge, S. V., Stummann Hansen, S., Dall Mahler, D. L., Bertelsen, R., F. Bigelow, G., Buttier, S., D. Morris, C., Rackham, D. J., & E. Batey, C. (1989). English summaries/Danske resumeer. Hikuin, 15(15), 231–237. Hentet fra https://tidsskrift.dk/Hikuin/article/view/150360