Vaysi, Ramin, and S. Sajad Ashrafi. “Determination and Comparison of the Extractives Chemical Compounds in Wood and Bark of Planted Eldar Pine Tree by GC-MS Methods”. Asian Journal of Chemistry, vol. 25, no. 3, Oct. 2012, pp. 1474-6, doi:10.14233/ajchem.2013.13089.