Pornpan Theprungsimankul, Supaporn Junsank, Aksarapak Abdulloh and Wirawan Chinviriyasit (2011) “The Effect of Cross-Immunity in a Multi-Strain Epidemic Model”, Agriculture and Natural Resources. Bangkok, Thailand, 45(3), pp. 563–570. Available at: https://li01.tci-thaijo.org/index.php/anres/article/view/245333 (Accessed: 18 May 2024).