A. A. Yaseen and M. T. Hajos, “EFFECT OF BIOSTIMULANTS ON SOME BIOACTIVE COMPOUNDS AND NITRATE LEVEL IN LETTUCE (Lactuca sativa L.) GROWN UNDER UNHEATED PLASTIC TUNNEL”, Iraqi J. Agric. Sci., vol. 52, no. 6, pp. 1318–1325, Dec. 2021, doi: 10.36103/ijas.v52i6.1471.