NON-ADDITIVE HARD SPHERE MIXTURES, NUMERICAL RESULTS FOR NEGATIVE NON-ADDITIVE PARAMETER D. Levesque, J.H. Nixon, M. Silbert and J.J. Weis J. Phys. Colloques, 41 C8 (1980) C8-317-C8-320 DOI: 10.1051/jphyscol:1980880