Pino Romero, Neisser, and Roxana López Cruz. “Stability Theorems for a Mathematical Model SI With Vital Dynamics Structured by Sex for the Infection Free Steady Developed by the Ordinary Differential Equations and the Delay Differential Equations Respectively”. Selecciones Matemáticas 4, no. 02 (December 15, 2017): 202-210. Accessed December 27, 2024. https://revistas.unitru.edu.pe/index.php/SSMM/article/view/1625.