H. Kddo, Y., and A. D. Nader. “Palynostratigraphy, Age Determination and Paleoecology of Butmah Formation in Borehole Kand-1 Northern Iraq”. Iraqi National Journal of Earth Science (INJES), vol. 14, no. 1, Dec. 2014, pp. 33-48, doi:10.33899/earth.2014.87486.