Pissuwan, D. and Suntornsuk, W. (2001) “Production of Keratinase by Bacillus sp. FK 28 Isolated in Thailand”, Agriculture and Natural Resources. Bangkok, Thailand, 35(2), pp. 171–178. available at: https://li01.tci-thaijo.org/index.php/anres/article/view/240302 (accessed: 11 October 2026).