E. Shalenov, K. Dzhumagulova, Y. Tashkenbayev, Y. . Seitkozhanov, and M. Jumagulov, “About the interaction of positrons with hydrogen and helium atoms ”, Rec.Contr.Phys., vol. 2025, no. 1, pp. 76–83, Mar. 2025, doi: 10.26577/RCPh20259218.