1. Dislocations;Friedel,1964
2. The Plastic Deformation of Metals;Honeycombe,1968
3. Theory of Dislocations;Anderson,2017
4. Plastic deformation of single crystals of sapphire: basal slip and twinning;Kronberg;Acta Metall.,1957
5. On basal slip and basal twinning in sapphire (α-Al2O3) – I. Basal slip revisited;Bilde-Sørensen;Acta Metall.,1996