DISLOCATION PINNING EFFECTS IN OXIDIZED AND REDUCED COPPER AFTER ELECTRON IRRADIATION AT 4.2 K B. Wantzen, G. Sokolowski and K. Lücke J. Phys. Colloques, 44 C9 (1983) C9-551-C9-556 DOI: 10.1051/jphyscol:1983981