GRB 131127A: nanshan optical upper limit. Xu, D. ; Liu, J. -Z. ; Feng, G. -J. ; Niu, H. -B. ; Bai, C. -H. ; Esamdin, A. ; Ma, L. Abstract Publication: GRB Coordinates Network Pub Date: 2013 Bibcode: 2013GCN.15518....1X