Hongxing, Zhang, et al. “Determination of Amino Acids and Mineral Elements in Flower Tissue of Amygdalus Persica Var. Persica F. Duplex”. Indian Journal of Horticulture, vol. 73, no. 02, June 2016, pp. 294-5, https://journal.iahs.org.in/index.php/ijh/article/view/1590.