GEHRKE, J. V. Walfrid Ekman: On Dead-water. With a preface by Professor Vilhelm Bjerknes. The Norwegian North Polar Expedition 1893—1896. Scientific Results Vol. V No. XV. Geografisk Tidsskrift, [S. l.], v. 19, 1908. Disponível em: https://tidsskrift.dk/geografisktidsskrift/article/view/49398. Acesso em: 25 apr. 2024.