Karayigit, Raci, Mehmet Akif Sahin, Cengizhan Sari, Aysegul Sisman, Haktan Yildiz, Hakan Buyukcelebi, and Gülfem Ersöz. “The Effects of Low-Dose Caffeinated Coffee Ingestion on Strength and Muscular Endurance Performance in Male Athletes”. Progress in Nutrition 23, no. 1 (March 31, 2021): e2021001. Accessed April 11, 2021. https://mattioli1885journals.com/index.php/progressinnutrition/article/view/9067.