1. Atlas der Dichte des Meerwassers. Teil. 1 & 2 (n.d.) Germany, Kriegsmarine 2210/2, pp 9–14.
2. Caracteres hydrographiques du Secteur Sud;De Buen,1931
3. Hydrographie du Detroit de Gibraltar en Mars 1933;De Buen,1933
4. The Norwegian Sea. Its physical oceanography based upon the Norwegian researches 1900–1904;Helland-Hansen;Rept. Norwegian Fish. Marine Invest.,1909
5. Periodical variations in temperature and salinity in the Straits of Gibraltar;Jacobsen,1934