“The Influence of Heavy Metals and Water Parameters on the Composition and Abundance of Water Bugs (Insecta: Hemiptera) in the Kerian River Basin, Perak, Malaysia”. Tropical Life Sciences Research, vol. 25, no. 2, Dec. 2014, pp. 61–79, https://ejournal.usm.my/tlsr/article/view/tlsr_vol25-no-2-2014_5.