Detection of O VI lambda 1033 and Far-UV Spectral Variability in Lenses UM 425 and PGlll5+080 Michalitsianos, A. G. ; Oliversen, R. J. ; Maran, S. P. Abstract Publication: Clusters, Lensing, and the Future of the Universe Pub Date: 1996 Bibcode: 1996ASPC...88..241M