YILMAZ, HUDAI, et al. “Effect of Various Development Periods on Accumulation of Some Mineral Elements on the Leaves of Strawberry Cultivars (Fragaria X Ananassa Dutch. L)”. Asian Journal of Chemistry, vol. 19, no. 7, Mar. 2010, pp. 5459-70, https://asianpubs.org/index.php/ajchem/article/view/13154.