Zahra Sobati-Nasab, Abolfazl Alirezalu, and Parviz Noruzi. 2021. “Improvement of physiological and phytochemical parameters of pot marigold (Calendula officinalis) using foliar application of zinc”. Agriculture and Natural Resources 55 (1). Bangkok, Thailand:81-88. https://li01.tci-thaijo.org/index.php/anres/article/view/249293.