Opaev A, Kolesnikova Y, Liu M, Kang Z. Singing of Claudia?s Leaf-warbler (Phylloscopus claudiae) in aggressive contexts: role of song rate, song type diversity and song type transitional pattern. Journal of Ornithology. 2018. Available at: http://link.springer.com/10.1007/s10336-018-1614-4.