GRB060912: OPTIMA-burst optical observations. Stefanescu, A. ; Schrey, F. ; Duscha, S. ; Muehlegger, M. ; Primak, N. ; Kanbach, G. ; Steinle, H. Abstract Publication: GRB Coordinates Network Pub Date: 2006 Bibcode: 2006GCN..5564....1S