Rattanongpisat, Waraporn, Somchart Soponronnarit, and Thanit Swasdisevi. 1999. “Development of a Mathematical Model for Heat Pump Fruit Drying”. Agriculture and Natural Resources 33 (1). Bangkok, Thailand:146-58. https://li01.tci-thaijo.org/index.php/anres/article/view/240456.