August von Pelzeln: Zur Ornithologie Brasiliens: Resultate von Johann Natterers Reisen in den Jahren 1817 bis 1835. Band2. Wien 1871, S.75 (biodiversitylibrary.org).
Charles Chubb: Descriptions of new genera and a new subspecies of South American birds. In: The Annals and magazine of natural history; zoology, botany, and geology being a continuation of the Annals combined with Loudon and Charlesworth's Magazine of Natural History. Band2, Nr.7, 1918, S.123 (https://www.biodiversitylibrary.org/page/15630831#page/142/mode/1up biodiversitylibrary.org).
Morton L. Isler, Phyllis R. Isler, Bret M. Whitney, Kevin J. Zimmer, Andrew Whittaker: Species limits in antbirds (Aves: Passeriformes: Thamnophilidae): An evaluation of Frederickena unduligera (Undulated Antshrike) based on vocalizations. In: Zootaxa. Band2305, 2009, S.61–68, doi:10.11646/zootaxa.2305.1.5.
Manuel Andrés Sanchez-Martínez, Gustavo A. Londoño: Nesting behavior of male and female Undulated Antshrike (Frederickena unduliger). In: Journal of Field Ornithology. Band87, Nr.1, 2016, S.21–28, doi:10.1111/jofo.12137.