AN IN-SITU REFLECTION-SPECTROSCOPIC STUDY APPLIED TO ANODIC OXIDE FILMS ON IRON, NICKEL, AND TITANIUM T. Ohtsuka, K. Azumi et N. SatoJ. Phys. Colloques, 44 C10 (1983) C10-191-C10-194DOI: https://doi.org/10.1051/jphyscol:19831039