Walters, Michael (2006): Colour in birds' eggs: the collections of the Natural History Museum, Tring. Historical Biology 18(2): 141–204. (HTML abstract) Yeung, C; Lai, F-M; Yang, X-J; Han, L-X; Lin, M-C. & Li, S-H. (2006): Molecular phylogeny of the parrotbills (Paradoxornithidae). J. Ornithol. 147(Supplement 1): 87–88. (HTML abstract) Sinosuthora Parrotbills Birds of China Birds described in 1870