sagala, irwan pernandi, Delfitri Munir, and Andrina Y.M Rambe. “Olfactory Functions Difference on Gas Station Workers Using Sniffin’ Sticks Test”. Sumatera Medical Journal 3, no. 2 (April 14, 2020). Accessed August 4, 2025. https://talenta.usu.ac.id/smj/article/view/1224.