Indology, Ancient Indian History, Indian Astronomy, Metrology, Hinduism.
https://rajarammohanroy.medium.com/surya-siddhanta-was-not-written-over-14-000-years-ago-response-to-questions-raised-by-rupa-bhaty-478f7909efd4. 5. Dating the Surya Siddhanta, Dating the Surya Siddhanta | Dr. Raja Ram Mohan Roy | #SangamTalks — YouTube. 6. Kuppanna Sastry, T.S. (1985). Vedāṅga