Nkeki, C. I., and I. A. Mbarie. 2026. “On Mathematical Modelling and Global Stability Analysis of an SEQI$_1$I$_2$I$_3$HR Chickenpox Epidemic Model With Vaccination Rate”. Journal of Applied Nonlinear Dynamics 15 (2): 409-38. https://doi.org/10.5890/JAND.2026.06.012.