AL.SHYBANY, AMAH S. S.; YASSEN, A. A. Effect of growth regulators Naphthalene acid and Salicylic and Humic acid in growth and produce nigellon and thymoquinon of Nigella sativa L. Al-Qadisiyah Journal of Pure Science, v. 18, n. 2, p. 52-68, 19 Aug. 2017.