Magnetic and hyperfine properties of NpFe2-xCoxSi2 tetragonal systems J. Gal, S. Fredo, Z. Hadari, J.L. Buevoz et C.-H. de Novion J. Phys. Colloques, 40 C4 (1979) C4-18 DOI: 10.1051/jphyscol:1979404