Hard x-ray spectroscopy of the itinerant magnets RFe4Sb12(R=Na,K,Ca,Sr,Ba) - Mounssef Junior, Bassim; Cantarino, Marli dos Reis; Bittar, Eduardo M; Germano, Társis M; Leithe-Jasper, Andreas; Garcia, Fernando Assis (Physical Review B, 2019)