HYDROSTATIC-PRESSURE-TUNING FROM CLASSICAL TO TUNNELING MOTION AND FROM OFF- TO ON-CENTER POTENTIALS FOR Ag+, Cu+ AND Li+ DEFECTS U. HOLLAND et F. LÜTYJ. Phys. Colloques, 37 C7 (1976) C7-272DOI: https://doi.org/10.1051/jphyscol:1976765