Mazzali, P. A., Kawabata, K. S., Maeda, K., Nomoto, K., Filippenko, A. V., Ramirez-Ruiz, E., et al. (2005). An asymmetric energetic type Ic supernova viewed off-axis, and a link to gamma ray bursts. Science, 308(5726), 1284-1287. doi:10.1126/science.1111384.