De Wit, Maarten, e John Rogers. 2007. “I Workshop Problems in the Western Gondwana Geology - South America-Africa Correlations: Du Toit Revisited Gramado, Rio Grande Do Sul, Brasil, 27 a 29 De Agosto De 2007”. Boletim De Geociências Da Petrobras 15 (1): 163-71. https://bgp.petrobras.com.br/bgp/article/view/361.