GRB 130608A: ISON-kislovodsk optical upper limit. Volnova, A. ; Linkov, V. ; Suvorov, M. ; Nevskiy, V. ; Ivanov, D. ; Molotov, I. ; Pozanenko, A. Abstract Publication: GRB Coordinates Network Pub Date: 2013 Bibcode: 2013GCN.14861....1V