COLOUR CENTRES IN OXIDESEffect of the V- ↔ V= transformation on positron annihilation lifetime spectra in MgO W. C. Mallard, F. H. Hsu et E. R. Vance J. Phys. Colloques, 41 C6 (1980) C6-501-C6-503 DOI: 10.1051/jphyscol:19806130