Petrology and geochemistry of the Passa Quatro alkaline complex, southeastern Brazil - Brotzu, Pietro; Barbieri, Mario; Beccaluva, Luigi; Garbarino, Carlo; Gomes, Celso B.; Macciotta, Giampaolo; Melluso, Leone; Morbidelli, Lucio; Ruberti, Excelso; Sígolo, Joel Barbujiani; Traversa, Gianbosco (Journal of South American Earth Sciences, 1992)