Kaewma, S., Suphappornchai, S., Suwimonteerabutr, J., Am-In, N. and Techakumphu, M. (2021) “Zinc supplementation improves semen quality in boars”, The Thai Journal of Veterinary Medicine, 51(3), pp. 489–500. available at: https://he01.tci-thaijo.org/index.php/tjvm/article/view/251260 (accessed: 6 October 2026).