BHARADWAJ, D.; VENKATACHALA, B. Spore assemblage out of a lower carboniferous shale from Spitzbergen. Journal of Palaeosciences, [S. l.], v. 10, n. (1-2), p. 18–47, 1961. DOI: 10.54991/jop.1961.605. Disponível em: https://jpsonline.co.in/index.php/jop/article/view/605. Acesso em: 9 may. 2024.