Coll, Carmen, Sergio Romero-Vivó, and Elena Sánchez. “On a Safety Set for an Epidemic Model With a Bounded Population”. Mathematical Modelling and Analysis 27, no. 2 (April 27, 2022): 263–281. Accessed November 22, 2024. https://jest.vgtu.lt/index.php/MMA/article/view/14586.