Ptumporn Muangphra, and Arunee Sommani. “Soil Protozoa and Bacteria Near Canna sp., Avicennia sp., and Cauarina sp. Root”. Agriculture and Natural Resources, vol. 23, no. 4, Dec. 1989, pp. 364-72, https://li01.tci-thaijo.org/index.php/anres/article/view/242318.