F. Garousi, S. Veres, and B. Kovács, “Non-destructive and destructive measurements’ chlorophyll content in sunflower and maize plants uptaken different chemical forms of selenium”, COLUMELLA, vol. 2, no. 2, pp. 9–15, Dec. 2015, doi: 10.18380/SZIE.COLUM.2015.2.2.9.