Vinn, Olev, et al. “The First Record of Endobiotic Cornulitids in a Heliolitid Coral from the Hirnantian (Late Ordovician) of Estonia”. Revista Brasileira De Paleontologia, vol. 28, no. 4, Feb. 2026, p. e20250548, https://sbpbrasil.org/publications/index.php/rbp/article/view/548.