On the valence fluctuation phenomena in SmS compounds F. Brouers, K. H. Bennemann, O. L.T. de Menezes, A. Troper et A. A. GomesJ. Phys. Colloques, 40 C5 (1979) C5-352-C5-353DOI: https://doi.org/10.1051/jphyscol:19795123
