Sgarbi, P.B.A., and J.G. Valenca. “Petrography and General Chemical Features of Potassic Mafic to Ultramafic Alkaline Volcanic Rocks of Mata Da Corda Formation, Minas Gerais State, Brazil”. International Kimberlite Conference: Extended Abstracts, vol. 5, Feb. 1991, pp. 359-60, doi:10.29173/ikc2569.