1. Agarwal, R. (2008). Public transportation and customer satisfaction: The case of Indian railways. Global Business Review, 9(2), 257–272.
2. Ayyappan, V. (2020). Southern railway to use AI for maintenance of S &T systems at 10 stations. The Economic Times. https://cio.economictimes.indiatimes.com/news/next-gen-technologies/southern-railway-to-use-ai-for-maintenance-of-st-systems-at-10-stations/79334396. Accessed April 2022.
3. Ayyappan, V., & TNN. (2020). Southern Railway sees more crimes against women. The Times of India. https://timesofindia.indiatimes.com/city/chennai/southern-railway-sees-more-crimes-against-women/articleshow/78267835.cms. Accessed April 2022
4. Azadeh, A., Salehi, V., & Kianpour, M. (2018). Performance evaluation of rail transportation systems by considering resilience engineering factors: Tehran railway electrification system. Transportation Letters, 10(1), 12–25. https://doi.org/10.1080/19427867.2016.1207928.
5. Bao, Q., Ruan, D., Shen, Y., Hermans, E., & Janssens, D. (2012). Improved hierarchical fuzzy topsis for road safety performance evaluation. Knowledge-Based Systems, 32, 84–90.