Farouk , Hisham, and Dina El-Zahra. “COMPARATIVE STUDY ON THE ENVIRONMENTAL SUSTAINABILITY OF MANUAL VERSUS ROBOTIC CLEANING METHODS IN URBAN SPACES”. Journal of Sustainable Technologies and Infrastructure Planning 6, no. 12 (November 9, 2022). Accessed July 6, 2024. https://publications.dlpress.org/index.php/JSTIP/article/view/85.