S. N. A.-B. Al-Badri and H. A. A.-A. Al-Amrani, “ROLE OF FOLIAR APPLICATION WITH PLANT EXTRACTS, AND ADDING HUMIC ACID IN GROWTH OF Calendula officinalis AND ITS CONTENT FROM ZEAXANTHIN AND LYCOPENE”, Iraqi J. Agric. Sci., vol. 57, no. 1, pp. 55–70, Jan. 2026, doi: 10.36103/46v3rt59.