LAGAK, NAGDELINE ESTER ANAK PATRICK; MOHAMAD, MAHATHIR. Numerical Analysis of An Improved SIR Model For COVID-19 Outbreak in Malaysia Using Variational Iteration Method. Enhanced Knowledge in Sciences and Technology, [S. l.], v. 3, n. 2, p. 138–147, 2023. Disponível em: https://publisher.uthm.edu.my/periodicals/index.php/ekst/article/view/10801.. Acesso em: 18 jul. 2024.