Revathi R, Poojitha S, Preethi S, Susmitha S.P. “Voice Controlled Indoor Air Purifier With Sleeping Aid”. Mathematical Statistician and Engineering Applications 71, no. 4 (January 10, 2023): 8479–8485. Accessed March 10, 2026. https://philstat.org/index.php/MSEA/article/view/1531.