Nadhim, E. A., C. K. Hon, B. Xia, I. Stewart, and D. Fang. “Investigating the Relationships Between Safety Climate and Safety Performance Indicators in Retrofitting Works”. Construction Economics and Building, Vol. 18, no. 2, June 2018, pp. 110-29, doi:10.5130/AJCEB.v18i2.5994.