Lindbergite, a new Mn oxalate dihydrate from Boca Rica mine, Galiléia, Minas Gerais, Brazil, and other occurences - Atencio, Daniel; Coutinho, José Moacyr Vianna; Graeser, Stefan; Matioli, Paulo Anselmo; Menezes Filho, Luiz Alberto Dias (American Mineralogist, 2004)