1. State space analysis of control systems;Ogata,1967
2. Cost control in construction industry;Gobourne,1973
3. Pilcher R., Principles of construction management, McGraw-Hill, UK, 1992.
4. Mawdesley MJ, Askew WH, O’Reilly MP, Planning and controlling construction projects, best laid plan, Longmann, UK, 1997.
5. Comparisons of systems for measuring project performance;Al-jibouri,2001