Rattananuch Chunpen, Duangrat Inthon, and Patana Thavipoke. 2021. “Development of a new microbial toxicity test based on inhibition of alpha-amylase production and its sensitivity against metal contaminants”. Agriculture and Natural Resources 55 (1). Bangkok, Thailand:113-18. https://li01.tci-thaijo.org/index.php/anres/article/view/249297.