H. Ostenfeld, C. (1920) “Paulsen, Ove: Studies in the Vegetation of Pamir (O. Olufsen, The Second Danish Pamir Expedition). Copenhagen, 1920, 132 pp., figs, and a map”., Geografisk Tidsskrift, 25. Tilgængelig hos: https://tidsskrift.dk/geografisktidsskrift/article/view/47117 (Set: 5 december 2025).