THE SNOEK RELAXATION IN TANTALUM AND NIOBIUM WITH RELATIVELY HIGH CONCENTRATIONS OF OXYGEN M. Weller, J.X. Zhang, K. Schulze, T.S. Kê et J. Diehl J. Phys. Colloques, 42 C5 (1981) C5-817-C5-822 DOI: 10.1051/jphyscol:19815127