1. An examination of the productivity decline in the construction industry;Stokes,1980
2. Assessment of financial incentive programmes for the construction labor force: a Delphi analysis;Laufer;Thesis presented to the University of Texas, at Austin, Texas, in partial fulfilment of the requirement for the degree of Doctor of Philosophy,1980
3. Productivity on the construction site;Civil Engineering, ASCE,1979
4. Motivating construction workers;Laufer;Journal of Construction Division, ASCE,1982