Sánchez-Beristain, Francisco, Pedro García-Barrera, and José Ramón Torres-Hernández. 2013. “The First Report of ‘chaetetids’ from the Cretaceous of North America and Their Palaeoecological Implications”. Revista Mexicana De Ciencias Geológicas 29 (3). https://rmcg.geociencias.unam.mx/index.php/rmcg/article/view/57.