Denglin, Luo, Liu Juan, Liu Yunhong, and Ren Guangyue. 2015. “Drying Characteristics and Mathematical Model of Ultrasound Assisted Hot-Air Drying of Carrots”. International Journal of Agricultural and Biological Engineering 8 (4). Beijing, China:124-32. https://ijabe.org/index.php/ijabe/article/view/1962.