P. Sommers

High-energy neutrinos from active galactic nuclei.

Sommers, Salamon, F. Stecker, 1991, Physical review letters.

Detection of a Cosmic Ray with Measured Energy Well Beyond the Expected Spectral Cutoff due to Cosmic Microwave Radiation

C. G. Larsen, D. Kieda, P. Sokolsky, 1994, astro-ph/9410067.