Birmani, N.A., Dharejo, A.M. and Khan, M.M. 2011. A new species of Polymorphus Lühe, 1911 (Acanthocephala: Polymorphidae) in Black Coot, Fulica atra (Aves: Rallidae), Pakistan. Zootaxa. 2929, 1 (Jun. 2011), 64–68. DOI:https://doi.org/10.11646/zootaxa.2929.1.7.