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*De Laubenfels, D.J., 1989. ''Agathis''. pp 429-442. In ''Flora Malesiana'', Series I, Vol. 10. Dordrecht, The Netherlands, Kluwer Academic Publishers.
*NWFP 6. Coppen J.J.W., 1995. ''Gums, resins and latexes of plant origin''. FAO, Rome. 142 p. (''Non-Wood Forest Products'', '''6'''). [http://www.fao.org/docrep/v9236e/v9236e00.htm en ligne] ; [[:en:Copal (FAO, NWFP 6)|Chapitre Copal sur Pl@ntUse]]
*Purata, S.E. (Ed.), 2008. Uso y manejo de los copales aromáticos: resinas y aceites. CONABIO/RAISES. i-60, 60 páginas, p. México.
*Ryan, J. Case ''et al.'', 2003. Chemistry and Ethnobotany of Commercial Incense Copals, Copal Blanco, Copal Oro, and Copal Negro, of North America. ''Economic Botany'', '''57'''(2) : 189–202. [https://doi.org/10.1663/0013-0001(2003)057%5B0189:CAEOCI%5D2.0.CO;2 doi : 10.1663/0013-0001(2003)057[0189:CAEOCI%5D2.0.CO;2].
*Stross, Brian, 1997. Mesoamerican Copal Resins. ''U-Mut Maya'', '''6''' : 177-186. [[:en:Copal (Stross)|sur Pl@ntUse]] et sur [https://web.archive.org/web/20150212150136/http://www.utexas.edu/courses/stross/papers/copal.htm WaybackMachine].
