Ponpituk, Yuwadee, Supalak Siri, Paanwaris Paansri, Mongkol Safoowong, Warong Suksavate, Dokrak Marod, and Prateep Duengkae. 2022. “Effects of Gap Age on Understory Bird Population in Mae Sa-Kog Ma Biosphere Reserve, Northern Thailand”. Agriculture and Natural Resources 56 (3). Bangkok, Thailand:645–656. https://li01.tci-thaijo.org/index.php/anres/article/view/255082.