ELECTRONIC PROPERTIES OF PURE AND INTERCALATED 2H-NbS2 BY MEANS OF PHOTOACOUSTIC SPECTROSCOPY P.S. Bechthold, R. Manzke et R. Schöllhorn J. Phys. Colloques, 44 C6 (1983) C6-159-C6-163 DOI: 10.1051/jphyscol:1983624