1. Oxygen isotopes, sea level changes and the temperature history of a coral reef environment in New Guinea over the last 105 years;Aharon;Palaeogeogr. Palaeoclimatol. Palaeoecol.,1986
2. Anon., 1944. Terrain Handbook 31; Kaoe Baai (Kao Bay) (Halmahera), Allied Geographical Section, Southwest Pacific Area, 70 pp.
3. Geology of the Ternate Quadrangle, north Maluku, 1:250,000 scale;Apandi,1980
4. Sources and accumulation rates of organic carbon in an equatorial peat bog (Burundi, East Africa) during the Holocene: carbon isotope constraints;Aucour;Palaeogeogr. Palaeoclimatol. Palaeoecol.,1999
5. Baretta, J.M., 1917. Halmahera en Morotai, Bewerkt naar de Memorie van den Kapitein van den Generale staf. Mededeling Encyclop. Bur., Aflevering XIII.