Study of 'CA IND.2''FE IND.2-X''NB IND.X''O IND.5+X' phases by x-ray diffraction , ir and epr spectroscopy - Moraes, I J; Terrile, Maria Cristina; Nascimento, Otaciro Rangel; Siu Li, Máximo; Francisco, Regina Helena Porto; Lechat, Johannes Rudiger (Materials Research Bulletin, 1992)