Razali, Z., Abd Wahab , M. F. ., Md Kawi , R. ., Omar, M. and Tay, C. C. (2020) “Sunflower (Helianthus annuus) for Phytoremediation of Zinc in Hydroponic System”, Scientific Research Journal, 17(2), pp. 99–118. doi: 10.24191/srj.v17i2.9733.