Alkaline complexes from the alto Paraguay province at the border of Brazil (Mato Grosso do Sul state) and Paraguay - Comin-Chiaramonti, P.; Gomes, Celso B.; Censi, Paolo; Gasparon, Massimo; Velázquez Fernandez, Victor (Mesozoic to Cenozoic alkaline magmatism in the brazilian platform, 2005)