1. Wang, B. Current and required research for improving performance of contractors. Problems of Organization and Management of Construction Seminar. Istanbul, Turkey.
2. Iselin, S. 1986. “The Construction contractor performance as a control mechanism”. Montary, California, USA: Naval Post Graduate School. MS Thesis,
3. Aytah, R. 1988. “Performance study of lovrest bidder bid awarding system in government projects”. Dhahran, Saudi Arabia: King Fahd University of Petroleum and Minerals. MS Thesis,
4. Causes of Delay in Large Building Construction Projects