STUDIES ON DISORDERED SYSTEMS USING CLUSTERS OF MUFFIN-TIN POTENTIALS J. S. FAULKNER, G. S. PAINTER, W. H. BUTLER and W. A. COGHLAN J. Phys. Colloques, 35 C4 (1974) C4-85-C4-87 DOI: 10.1051/jphyscol:1974414