1. Kolkata Metro - Information, Route Maps, Fares, Tenders & Updates;The Metro Rail Guy,2022
2. Kolkatas Tube Railway plan nipped in bud a century ago;Gupta;The Times of India. Archived from the original on,2020
3. Metro missed the train to Piccadilly;Deepankar;The Telegraph. Archived from the original on 22 August 2020,2014
4. 100 years in the making, why Kolkatas east-west corridor is worlds slowest metro project;Madhuparna;ThePrint. Archived from the original on 30 March 2020,2020