A DISLOCATION MECHANISM FOR THE GROWTH OF TWINS IN DEFORMED HCP METALS PH. KOMNINOU, E. POLYCHRONIADIS, J.G. ANTONOPOULOS, TH. KARAKOSTAS et P. DELAVIGNETTE J. Phys. Colloques, 51 C1 (1990) C1-215-C1-219 DOI: 10.1051/jphyscol:1990133