1. Abdullah, M. R. (2010). Significant causes and effects of construction delay. Master thesis, University Tun Hussein Onn Malaysia
2. Ahmed SA (2014) Evaluation of Risk Factors affecting Time And cost Of Construction Projects in Yemen. International journal of management 4(5):168–178
3. Al-Ansi NA (2012) Evaluating sites and services policy as approach to afford housing for low- income people in Yemen: case study. Journal of Science & Technology. 17(2):1–10
4. Ali AS, Kamaruzzaman SN (2010) Cost performance for building construction projects in Klang valley. Journal of Building Performance 1(1):110–118
5. Al-Sabahi, M. H., Al-Hamidi, A. A., Ramly, A. & Rejab, K. M (2014). Exploring Criteria and Critical Factors for Governmental Projects Implementation in Yemen: A Case Study. Journal of Surveying, Construction and Property (JSCP), 5(2). Pp.1–17