Päckert, Martin; Martens, Jochen; Severinghaus, Lucia Liu. The Taiwan Firecrest (Regulus goodfellowi) belongs to the goldcrest assemblage (Regulus regulus s. l.): evidence from mitochondrial DNA and the territorial song of the Regulidae. Journal of Ornithology. 2008, 150 (1): 205–220. S2CID 5626256. doi:10.1007/s10336-008-0335-5.
Päckert, Martin; Martens, Jochen; Severinghaus, Lucia Liu. The Taiwan Firecrest (Regulus goodfellowi) belongs to the goldcrest assemblage (Regulus regulus s. l.): evidence from mitochondrial DNA and the territorial song of the Regulidae. Journal of Ornithology. 2008, 150 (1): 205–220. S2CID 5626256. doi:10.1007/s10336-008-0335-5.