2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/27906This talk summarizes the results published in cond-mat/9703068 (PRL 79,733, 1997) and in cond-mat/9702168 (PR56, 2556, 1997). New results regarding c-dispersion as measered by de Haas-van Alphen, and regarding residual DOS problem, is added.Talk presented at the SNS'97 Conference, Cape Cod; 1 latex file, 1 ps figureSuperconductivitytext