Zavadskas, E. K., A. Kaklauskas, and T. Vilutienė. “Multicriteria Evaluation of Apartment Blocks Maintenance Contractors: Lithuanian Case Study”. International Journal of Strategic Property Management, vol. 13, no. 4, Dec. 2009, pp. 319-38, doi:10.3846/1648-715X.2009.13.319-338.