Shebany, Y. M., Y. A. Gherbawy, and S. Al-Garni. “Aspergillus Niger As the Source of Ochratoxin A of Contaminated Pyrus Communis in Taif Market”. Annual Research & Review in Biology, Vol. 30, no. 4, Mar. 2019, pp. 1-9, doi:10.9734/arrb/2018/v30i430018.