1. Petroleum biodegradation in the Tertiary reservoirs of the North Sea;Ahsan;Marine and Petroleum Geology,1997
2. Geochemical correlation of Windalia oil and extracts of Winning Group (Cretaceous) potential source rocks;Alexander,1981
3. Occurrence and formation of tricyclic and tetracyclic terpanes in sediments and petroleums;Aquino Neto,1983
4. The Ula Oil Field, Block 7/12, Norway;Bailey,1981
5. Ula Field: Relationship between structure and hysrocarbon distribution?;Brown,1992