Sultana, Tahira, Fariha Arooj, Muhammad Nawaz, Saman Alam, Muhammad Naeem Iqbal, Asfa Ashraf, and Saif-Ur-Rehman Kashif. 2019. “Phytoremediation Efficiency of Sunflower (Helianthus Annuus) and Bryophyllum (Bryophyllum Pinnatum) in Removing Heavy Metals from Polluted Soil”. International Journal of Alternative Fuels and Energy 3 (2):31-35. https://psmjournals.org/index.php/ijafe/article/view/366.