Soedijo, Samharinto, M. Indar Pramudi, and Salamiah, St Aisah. 2015. “Introduction Study of Potential of Natural Insecticide Liquid Smoke from Solid Waste Oil Palm to Brown Plant Hopper (Nilaparvata Lugens Stall) in South Kalimantan”. Asian Journal of Applied Sciences 3 (1). https://www.ajouronline.com/index.php/AJAS/article/view/2510.