SAULSBERRY, A. Should extinction be forever. Vanderbilt Undergraduate Research Journal, [S. l.], v. 10, 2015. DOI: 10.15695/vurj.v10i0.3983. Disponível em: https://ejournals.library.vanderbilt.edu/index.php/vurj/article/view/3983. Acesso em: 24 sep. 2020.