Studying the enhanced phytoremediation of lead contaminated soils via laser induced breakdown spectroscopy, Hassan, M., Sighicelli Maria, Lai A., Colao F., Ahmed A.H.H., Fantoni R., and Harith M.A. , Spectrochimica Acta - Part B Atomic Spectroscopy, 2008///, Volume 63, p.1225 - 1229, (2008)