2007 · A. Airapetian, N. Akopov, et al. · Physical review. D. Particles, fields, gravitation, and cosmology/Physical review. D. Particles and fields · 386
2005 · A. Airapetian, N. Akopov, et al. · Physical review. D. Particles, fields, gravitation, and cosmology/Physical review. D. Particles and fields · 263
2001 · A. Airapetian, N. Akopov, et al. · Physical review. D. Particles, fields, gravitation, and cosmology/Physical review. D. Particles and fields · 176