1975 · Y. Akimov, L. Golovanov, et al. · Physical review. D. Particles, fields, gravitation, and cosmology/Physical review. D. Particles and fields · 19
1977 · Y. Akimov, L. Golovanov, et al. · Physical review. D. Particles, fields, gravitation, and cosmology/Physical review. D. Particles and fields · 3