Project 5084: G. Mayr, V. Carrió, A. Kitchener. 2023. On the "screamer-like" birds from the British London Clay: An archaic anseriform-galliform mosaic and a non-galloanserine "barb-necked" species of Perplexicervix. Palaeontologia Electronica. 26 (2.a33):1-23.