1. Geochronology of some Banda Arc volcanics;Abbott,1981
2. Agustiyanto, D.A., 1995. The Geology and Tectonic Evolution of the Obi Region, Eastern Indonesia. MPhil thesis, University of London, 220pp.
3. Ahmad, W., 1975. Geology along the Matano fault zone, East Sulawesi, Indonesia. In: Wiryosujono, Sudrajat, A. (Eds.). Regional Conference on the Geology and Mineral Resources of Southeast Asia, Jakarta, 4–7 August 1975., pp. 143–150.
4. Evolution of the boundary between the Philippine Sea Plate and Australia: palaeomagnetic evidence from eastern Indonesia;Ali;Tectonophysics,1995
5. Geologic Map of the Kotamobagu Quadrangle, North Sulawesi 1: 250,000;Apandi,1977