Neha Gupta, Isha Saini, Gaurav Tiwari, Yash Sharma, and Kapil Malik. “SUSTAINABLE SMART CITIES: CONCEPT, CHALLENGES AND REALIZATION”. International Journal of Technical Innovation in Modern Engineering & Science 5, no. 19 (March 31, 2019): -. Accessed February 5, 2025. https://ijtimes.com/index.php/ijtimes/article/view/3367.