Owen, L., Jonathan Hoseana, & Benny Yong. (2023). A Numerical Study of Codimension-Two Bifurcations of an SIR-Type Model for COVID-19 and Their Epidemiological Implications. Communication in Biomathematical Sciences, 6(2), 156-168. https://doi.org/10.5614/cbms.2023.6.2.6