Salleh, Syahiirah, Uznir Ujang, Suhaibah Azri, and Tan Liat Choon. “3D Topological Validation of Compact Abstract Cell Complexes (CACC) Data Structure for Buildings in CityGML”. International Journal of Built Environment and Sustainability 7, no. 2 (April 29, 2020): 25–32. Accessed April 20, 2024. https://ijbes.utm.my/index.php/ijbes/article/view/457.