Koleoso, H., M. Omirin, Y. Adewunmi, and G. Babawale. “Applicability of Existing Performance Evaluation Tools and Concepts to the Nigerian Facilities Management Practice”. International Journal of Strategic Property Management, vol. 17, no. 4, Dec. 2013, pp. 361-76, doi:10.3846/1648715X.2013.861367.