Optical monitoring of BL Lacertae during the summer 1997 outburst Sobrito, G. ; Raiteri, C. M. ; Villata, M. ; de Francesco, G. ; Lanteri, L. ; Cavallone, M. ; del Bò, M. ; Drimmel, R. ; Marocco, F. ; Massone, G. ; Spagna, A. Abstract Publication: Multifrequency Monitoring of Blazars Pub Date: January 1998 Bibcode: 1998mmb..proc..180S