“Phyllotheca Douroensis Sp. nov., a New Equisetalean Fossil-Species from the Douro Carboniferous Basin (Upper Pennsylvanian; NW Portugal): Palaeobiogeographical, Systematic and Evolutionary Implications”. Biosis: Biological Systems 3, no. 1 (March 23, 2022): e001. Accessed December 18, 2024. https://eaapublishing.org/journals/index.php/biosis/article/view/162.