Puangdownreong, Deacha. 2019. “Optimal PIDA Controller Design for Maglev Vehicle Suspension System by Lévy-Flight Firefly Algorithm: -”. Srinakharinwirot University Engineering Journal 14 (1). Bangkok, Thailand:12-22. https://ph02.tci-thaijo.org/index.php/sej/article/view/152003.