THIRD-HARMONIC SUSCEPTIBILITY |X3| OF QUASI-ONE-DIMENSIONAL SUPERCONDUCTORS Nb3S4, Nb3Se4, AND Nb3Te4 T. Ishida, H. Mazaki et I. Nakada J. Phys. Colloques, 44 C3 (1983) C3-1701-C3-1704 DOI: 10.1051/jphyscol/1983093