“ONTOGENY, STRUCTURE AND MOULTING OF PARABOLINA FREQUENS ARGENTINA (KAYSER) (TRILOBITA, OLENIDAE) FROM THE FURONGIAN OF NORTHWESTERN ARGENTINA”. Ameghiniana 45, no. 1 (March 14, 2008): 13–31. Accessed September 22, 2025. https://ameghiniana.org.ar/index.php/ameghiniana/article/view/206.