Kumar, Niraj; Driem, George van; Stobdan, Phunchok (2020-11-18). Himalayan Bridge. Routledge. ISBN978-1-000-21551-9. Archived from the original on 2022-06-14. Retrieved 2022-06-14.
Kumar, Niraj; Driem, George van; Stobdan, Phunchok (2020-11-18). Himalayan Bridge. Routledge. ISBN978-1-000-21551-9. Archived from the original on 2022-06-14. Retrieved 2022-06-14.