Sultana, T.; Arooj, F.; Nawaz, M.; Alam, S.; Iqbal, M. N.; Ashraf, A.; Kashif, S.-U.-R. Phytoremediation Efficiency of Sunflower (Helianthus Annuus) and Bryophyllum (Bryophyllum Pinnatum) in Removing Heavy Metals from Polluted Soil. Int J Altern Fuels Energy 2019, 3, 31-35.