Belete, Y., and E. Dagne. “HPTLC ASSAY OF THYMOQUINONE IN BLACK SEED AND BLACK SEED OIL (NIGELLA SATIVA LINN) AND IDENTIFICATION OF THYMOQUINONE CONVERSION WITH UV-VIS”. Journal of Drug Delivery and Therapeutics, Vol. 4, no. 4, July 2014, pp. 5-9, doi:10.22270/jddt.v4i4.895.