Mlíkovský, J., S. Frahnert, and V. M. Loskot. “Type Specimens of Anthus berthelotii Bolle, 1862 (Aves: Motacillidae)”. Zootaxa, vol. 3669, no. 4, June 2013, pp. 597–600, doi:10.11646/zootaxa.3669.4.11.