Sivakumar, S, and Samsar, A. “IMPLEMENTATION OF IMPROVED LANDSCAPING PROCESS BASED ON ISO 21500:2021 AT SOUTH EASTERN UNIVERSITY OF SRI LANKA”. EPRA International Journal of Multidisciplinary Research (IJMR), vol. 9, no. 2, Feb. 2023, pp. 4-17, http://eprajournals.net/index.php/IJMR/article/view/1447.