Donatelli, Reginaldo José. “ Cranial Osteology and Myology of the Jaw Apparatus in the Galbulidae (aves, Piciformes) ”. Arquivos De Zoologia, vol. 32, no. 1, Sept. 1992, pp. 1-32, https://doi.org/10.11606/issn.2176-7793.v32i1p1-32.