Y. Belete 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”, J. Drug Delivery Ther., vol. 4, no. 4, pp. 5–9, Jul. 2014, doi: 10.22270/jddt.v4i4.895.