Mahmood, Z. F., & Ibrahim, K. M. (2017). Evaluation of Helianthus annuus L. tolerance for Zinc in vitro post combination with Naphthalene acetic acid and Benzyl adenine. World Journal of Experimental Biosciences (ISSN: 2313-3937) , 5(1), 14-18. https://wjebio.com/index.php/journal/article/view/112