1. How Design Consultants Perceive Causes of Variation Orders for Institutional Buildings in Singapore;FM;Architectural Engineering and Design Management,2005
2. Arain FM, Pheng L. Effective Management of Contract Variations using Knowledge Based Decision Support Systems. Cadiff: Centre for Education in the Built Environment. USA; 2006.
3. Mohammad N, Che AAI, Rakmat RAOK, et al. Investigation on the causes of variation orders in the construction of building project – a study in the state of Selangor. Malaysia. 2010;1(1).
4. Mohamed AA. Analysis and Management of Change Orders for combined Sewer over flow construction projects. Dissertation, Wayne State University Occupational Health and Safety Act No 85 of 1993, 2003, Construction regulation. 2001.
5. Finsen E. The Building Contract – A Commentary on the JBCC Agreements. 2nd ed., Kenwyn: Juta and Co, Ltd. USA; 2005.