Keskin, M, S Gül, İ Karaaslan, and A Yakan. “Controlling the Photoperiod to Raise the Melatonin Content of Sheep Milk. Photoperiod Control and Milk Melatonin Content”. Journal of the Hellenic Veterinary Medical Society 74, no. 4 (January 18, 2024): 6641–6648. Accessed May 8, 2024. https://ejournals.epublishing.ekt.gr/index.php/jhvms/article/view/31879.