Orlando, E. High Energy Astrophysics, MPI for Extraterrestrial Physics, Max Planck Society;
Abdo, A. A., Ackermann, M., Ajello, M., Baldini, L., Ballett, J., Barbiellini, G., et al. (2009). Fermi LAT discovery of extended gamma-ray emission in the direction of supernova remnant W51C. The Astrophysical Journal Letters, 706(1), L1-L6. doi:10.1088/0004-637X/706/1/L1.