Excelso, Ruberti, et al. “New Ar-Ar Age and C-O Isotope Geochemistry of the Piedade (Aps) Carbonatite Complex of the Ponta Grossa Arch Region, Southern Brazil: Petrological Implications”. International Kimberlite Conference: Extended Abstracts, vol. 12, July 2024, doi:10.29173/ikc4154.