Becker, Werner High Energy Astrophysics, MPI for Extraterrestrial Physics, Max Planck Society;
Caraveo, P., De Luca, A., Mereghetti, S., Pellizzoni, A., Bignami, G., Tur, A., et al. (2004). XMM-Newton and Geminga. In F. Camilo, & B. M. Gaensler (Eds.), Young neutron stars and their environments: Proceedings of the 218th Symposium of the International Astronomical Union (pp. 215-218). San Franscisco: Astronomical Society of the Pacific.