Vera, E. I., & Cesari, S. N. Cyathealean Antarctic ferns from the Aptian Cerro Negro Formation: Rafaherbstia nishidai gen. et sp. nov. and associated fertile organs. Review of Palaeobotany and Palynology, 254, 33.
Chicago Style (17th ed.) CitationVera, Ezequiel Ignacio, and Silvia Nelida Cesari. "Cyathealean Antarctic Ferns from the Aptian Cerro Negro Formation: Rafaherbstia Nishidai Gen. Et Sp. Nov. and Associated Fertile Organs." Review of Palaeobotany and Palynology 254 (): 33.
MLA (9th ed.) CitationVera, Ezequiel Ignacio, and Silvia Nelida Cesari. "Cyathealean Antarctic Ferns from the Aptian Cerro Negro Formation: Rafaherbstia Nishidai Gen. Et Sp. Nov. and Associated Fertile Organs." Review of Palaeobotany and Palynology, vol. 254, , p. 33.
Warning: These citations may not always be 100% accurate.