Paisanwarakiat, R. and Thamchai, R. (2021) “Optimal Control of a Leptospirosis Epidemic Model”, Science & Technology Asia, 26(1), pp. 9–17. available at: https://ph02.tci-thaijo.org/index.php/SciTechAsia/article/view/214606 (accessed: 9 December 2025).