Zhaugasheva, S. A., G. S. Nurbakova, G. G. Saidullaeva, and N. Khabyl. “Form Factors for BK l+l- Decay”. International Journal of Mathematics and Physics, vol. 5, no. 2, Dec. 2014, pp. 57-60, doi:10.26577/2218-7987-2014-5-2-52-56.