THE ANISOTROPY OF THE SURFACE ENERGY OF NICKEL MEASURED BY T.E.M. OF FIELD EMITTERS T. Barsotti, J.M. Bermond and M. Drechsler J. Phys. Colloques, 45 C9 (1984) C9-43-C9-46 DOI: 10.1051/jphyscol:1984908