1. Angagan JS, Buot IE Jr, Relox RE, Rebancos CM. Ethnobotany of the plant resources in Conner, Apayao, northern Luzon, Philippines. Journal Nature of Studies. 2010;9(1):31–8.
2. Baculi R, Balangcod T, Gutierrez R, Pastor N. Puma-at T. Agathis dammara (lamb.) L. C. Rich from the Cordillera region, Philippines and its antibiotic properties. Khon Kaen; 2015.
3. Boer E, Ella AB. Plant resources of South East Asia 18. Plants producing exudates 2000: 139-40.
4. Celeste LR. Using suitable projects in adding value to nonwood forest products in the Philippines: the copal (Agathis philippinensis) trade in Palawan. Econ Bot. 2004;58(3):476–85. https://doi.org/10.1663/0013-0001(2004)058[0476:USPIAV]2.0.CO;2.
5. Chen Z, He D, Deng J, Zhu J, Mao Q. Chemical composition and antibacterial activity of the essential oil from Agathis dammara (lamb.) rich fresh leaves. Nat Prod Res. 2015;29(21):2050–3.