RAO, A.; ACHUTHAN, V. Further Contribution to our Knowledge of the Anatomy of Ptilophyllum. Journal of Palaeosciences, [S. l.], v. 16, n. (1-3), p. 249–257, 1967. DOI: 10.54991/jop.1967.525. Disponível em: https://www.jpsonline.co.in/index.php/jop/article/view/525. Acesso em: 18 may. 2024.