GRB 180314B: Zeiss-1000/CrAO optical upper limit. Mazaeva, E. ; Pozanenko, A. ; Novichonok, A. ; Nikolenko, I. ; Volnova, A. ; Molotov, I. Abstract Publication: GRB Coordinates Network Pub Date: 2018 Bibcode: 2018GCN.22497....1M