A Comparative Study of Tumor Regression Efficiency under the Impact of Cytokines Interleukin-21 and Interleukin-2 for Cancer Treatment Cultured with Chemo - Immunotherapy: A Mathematical Modeling Approach. Punjab Univ. J. Math. [Internet]. 2018 Jun. 30 [cited 2025 Jun. 29];50(2):66-81. Available from: https://pujm.pu.edu.pk/index.php/pujm/article/view/130