Project 4518: C. De Gracia, A. Correa-Metrio, M. Carvalho, J. Velez-Juarbe, T. Přikryl, C. Jaramillo, J. Kriwet. 2022. Towards a unifying systematic scheme of fossil and living billfishes (Teleostei, Istiophoridae). Journal of Systematic Palaeontology. 20 (1):1-36.