U. K. Mallick, A. Rahman, M. H. A. Biswas, M. Samsuzzoha, and S. K. Roy, “An Optimal Immunotherapeutic Treatment of HIV Infections to Regain the Targeted CD4$^+$T Cell Count: A Boundary Value Problem Approach”, JAND, vol. 12, no. 1, pp. 39–51, Aug. 2026, doi: 10.5890/JAND.2023.03.003.