1. Geological map of the Kotamobagu Quadrangle, North Sulawesi;Apandi,1977
2. Porphyry copper-gold deposits of the Tombulilato district, North Sulawesi, Indonesia: an extension of the Philippine porphyry copper-gold province;Carlile,1985
3. Geological map of the Manado Quadrangle, North Sulawesi;Effendi,1976
4. Tectonics of the Indonesian region;Hamilton;U.S. Geol. Surv., Prof. Pap. 1078,1979
5. Mineralization associated with volcanic-related hydrothermal systems in the Circum-Pacific basin;Hedenquist,1986