1. An econometric analysis of the determinants of exploration for petroleum outside North America;Broadman,1985
2. Incentives and constraints on exploratory drilling for petroleum in developing countries;Broadman;Annual Review of Energy,1985
3. Risk sharing and incentives in the principal and agent relationship;Shavell,1979
4. Evolution of natural resource taxation in developing countries;Gillis;Natural Resources Journal,1982
5. The effects of taxation of petroleum exploitation: a comparative study;Kemp,1982