M. Ablikim, C. Q. Feng, M. N. Achasov et al.|Physical review. D. Particles, fields, gravitation, and cosmology/Physical review. D. Particles and fields|2013
L. Y. Dong, M. N. Achasov, X. Ai et al.|Physical review. D. Particles, fields, gravitation, and cosmology/Physical review. D. Particles and fields|2014