Hamza, J. H. ., alamere, maytham mehsen . and zahra, hayder abdel . (2011) “The effect of boron foliar on the germination and vigor of the resultant seed of sunflower (Helianthus annuus L.) plants”, Journal of Biotechnology Research Center, 5(1), pp. 31–39. doi: 10.24126/jobrc.2011.5.1.142.