Sa-ar, I. and Tonsakulrungruang, K. (2016) “Plumage-types of the Little-known Scarlet-breasted Flowerpecker Prionochilus thoracicus (Aves: Passeriformes: Dicaeidae)”, The Thailand Natural History Museum Journal, 10(2), pp. 125–129. available at: https://li05.tci-thaijo.org/index.php/thnhmj/article/view/1841 (accessed: 4 October 2026).