Robin VV, Katti M, Purshotham C, Sancheti A, Sinha A (2011). "Singing in the sky: song variation in an endemic bird on the sky islands of southern India". Animal Behaviour. 82 (3): 513—520. doi:10.1016/j.anbehav.2011.05.032. S2CID53144163.
Robin VV, Katti M, Purshotham C, Sancheti A, Sinha A (2011). "Singing in the sky: song variation in an endemic bird on the sky islands of southern India". Animal Behaviour. 82 (3): 513—520. doi:10.1016/j.anbehav.2011.05.032. S2CID53144163.