1. del Hoyo, J., and N. J. Collar (2016). HBW and BirdLife International Illustrated Checklist of the Birds of the World. Volume 2. Lynx Edicions, Barcelona, Spain.
2. Clements, J. F., T. S. Schulenberg, M. J. Iliff, S. M. Billerman, T. A. Fredericks, B. L. Sullivan, and C. L. Wood (2019). The eBird/Clements Checklist of Birds of the World: v2019. Cornell Laboratory of Ornithology, Ithaca, NY, USA.
3. Sexual Size Dimorphism and Sex Identification using Morphological Traits of Two Aegithalidae Species
4. Dickinson, E. C., and L. Christidis, Editors (2014). The Howard and Moore Complete Checklist of the Birds of the World. Fourth Edition. Volume 2: Passerines. Aves Press, Eastbourne, United Kingdom.
5. Päckert, M., J. Martens, and Y.-H. Sun (2010). Phylogeny of long-tailed tits and allies inferred from mitochondrial and nuclear markers (Aves: Passeriformes, Aegithalidae). Molecular Phylogenetics and Evolution 55(3):952–967.