ACEÑOLAZA, F. G.; DURAND, F. R. Trilobite traces on basal Ordovician Layers from the Argentine Puna. Acta Geológica Lilloana, [S. l.], v. 15, n. 1, p. 5–12, 1978. Disponível em: https://www.lillo.org.ar/journals/index.php/acta-geologica-lilloana/article/view/752. Acesso em: 10 nov. 2026.