O. J. Houshia, N. Al-daqqa, T. Alawneh, and I. Elmasri, “Investigation of Benzo-[a]-Pyrene Residue on Palestinian Olive Fruits and in Olive Oil”, IJBAS, vol. 1, no. 2, pp. 115–123, May 2012, doi: 10.14419/ijbas.v1i2.60.