1. Abdelhamid, T.S. (2003). Six-Sigma in Lean Construction Systems Opportunities and Challenges. Retrieved 26 August 2012 from http://www.leanconstruction.dk.
2. Abdullah, S., Abdul Razak, A., Abu Bakar, A.H. & Mohammad, I.S. (2009). Towards Producing Best Practice in the Malaysian Construction Industry: The Barriers in Implementing the Lean Construction Approach. Retrieved 26 August 2011 from http://eprints.usm.my.
3. Adamu, S. and Abdul Hamid, R. (2012). Lean construction techniques implementation in Nigeria construction industry. Canadian Journal on Environmental, Construction and Civil Engineering, 3, 4, May 2012.
4. Alinaitwe, H.M. (2009). Prioritising Lean Construction Barriers in Uganda's Construction Industry. Journal of Construction in Developing Countries, 15-30.
5. Bashir, A.M., Suresh, S., Proverbs, D. & Gameson, R. (2011) A critical, theoretical, review of the impacts of lean construction tools in reducing accidents on construction sites In: Egbu, C. and Lou, E.C.W. (Eds.) Procs 27th Annual ARCOM Conference, 5-7 September 2011, Bristol, UK, Association of Researchers in Construction Management, 249-258.