POTENTIAL DISTRIBUTION IN METAL-VACUUM-METAL PLANAR BARRIERS CONTAINING SPHERICAL PROTRUSIONS OR INCLUSIONS A.A. Lucas, J.P. Vigneron, J. Bono, P.H. Cutler, T.E. Feuchtwang, R.H. Good, Jr. Huang and Z. Huang J. Phys. Colloques, 45 C9 (1984) C9-125-C9-132 DOI: 10.1051/jphyscol:1984922