Ognjanova-Rumenova, N. G., and R. Pipík. “Stratigraphic and Taxonomic Significance of Siliceous Microfossils Collected from the Turiec Basin, Western Carpathians (Slovakia)”. Acta Botanica Croatica, vol. 74, no. 2, Oct. 2015, https://www.abc.botanic.hr/index.php/abc/article/view/1185.