1. Fellow R. Escalation management. PhD thesis, University of Reading, UK, 1988.
2. Maravas A, Konstantinidis D. Time, cost and quality of projects on the Egnatia Motorway. In: Proceedings of the third IDATE “cost, time and quality of public works construction in Greece today” conference, 2003.
3. European Council Directive 93/37/EEC. Concerning the coordination of procedures for the award of public works contracts, 14 June 1993.
4. European Parliament and Council Directive 2004/18. Concerning the co-ordination of procedures for the award of public works, contracts, public supply contracts and public service contracts, 31 March 2004.
5. Decision criteria in contractor prequalification;Russell;ASCE Journal of Management in Engineering,1988