T. Aaltonen, S. Behari, V. M. Abazov et al.|Physical review. D. Particles, fields, gravitation, and cosmology/Physical review. D. Particles and fields|2013
F. Abe, Y. Bonushkin, H. Akimoto et al.|Physical review. D. Particles, fields, gravitation, and cosmology/Physical review. D. Particles and fields|1999