แสนหาญ T. S., Januson Dikae, & Chaiyaporn Panyindee. (2021). Small Low-Cost Air Purifier Controlled by an Android Smartphone. NBTC Journal, 5(5), 319–333. Retrieved from https://so04.tci-thaijo.org/index.php/NBTC_Journal/article/view/240836