ELECTRON MICROSCOPY STUDY OF THE NATURE OF THE LOW-TEMPERATURE PHASE TRANSITION IN α-MnSe J. Van Landuyt, S. Amelinckx, H. Van der Heide et C.F. van Bruggen J. Phys. Colloques, 43 C4 (1982) C4-351-C4-355 DOI: 10.1051/jphyscol:1982450