Sukhamaya Swain, Siddhartha Bhattacharya. “Evaluation of Sustainability Elements in Transportation Sector of India”. European Economic Letters (EEL) 14, no. 3 (September 14, 2024): 1398–1407. Accessed October 26, 2025. https://www.eelet.org.uk/index.php/journal/article/view/1904.