Wielstra, B., T. Boorsma, and S. M. Pieterse. “An Update on the Avifauna of Gunung Lumut Protection Forest (East Kalimantan) and Reflections on the Potential Conservation Value of Hutan Adat”. KUKILA, Vol. 16, July 2012, pp. 1-15, https://kukila.org/index.php/KKL/article/view/300.