Chhetri, Rekha, Banyong Toomsan, Wanwipa Kaewpradit, และ Viriya Limpinuntana. 2012. “Traditional practice of leaf litter harvesting and utilization by farmers in west-central Bhutan: Paving the way for sustainable management”. วารสารแก่นเกษตร 40 (4):363-72. https://li01.tci-thaijo.org/index.php/agkasetkaj/article/view/250643.