Ara, Mitsuru, and Sarah Gonçalves Duarte. “Fossil Trichomes As a New Category of Palynomorphs Sensu Lato: Their Preliminary Classification and Applicability in Biostratigraphy”. Boletim Do Museu Paraense Emílio Goeldi - Ciências Naturais, vol. 5, no. 2, Aug. 2010, pp. 175-88, https://doi.org/10.46357/bcnaturais.v5i2.641.