- K. V. Mitov, N. M. Yanev, “Bellman–Harris branching processes with state-dependent immigration”, J. Appl. Probab., 22, no. 04, 1985,
757 
- Parkpoom Phetpradap, 3029, INTERNATIONAL CONFERENCE ON MATHEMATICAL ANALYSIS AND ITS APPLICATIONS 2022 (IConMAA 2022): Analysis, Uncertainty, and Optimization, 2024,
020002