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3. The unusual afterglow of the γ-ray burst of 26 March 1998 as evidence for a supernova connection
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5. Castro-Tirado, J. A., Bock, H., Greiner, J., Klose, S. & Gorosabel, J. 2000, GCN Circ. 579 (http://gcn.gsfc.nasa.gov/gcn/gcn3/579.gcn3)