Luttinger fermi surface of metallic gap spectral weight in 'ND IND.1.85''CE IND.0.15''CU''O IND.4 VET.Y' - Anderson, R O; Claessen, R; Allen, J W; Olson, C G; Janowitz, C; Liu, L Z; Park, J H; Maple, M B; Dalichaouch, Y; Andrade, M C; Jardim, Renato de Figueiredo; Early, E A (Physical Review Letters, 1993)