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Sharma, N and Sharma, U K and Gupta , A P and -------, Devla and Sinha, Arun K and Lal, Brij and Ahuja, Paramvir Singh (2009) Simultaneous densitometric determination of shikonin, acetylshikonin, and b-acetoxyisovalerylshikonin in ultrasonic-assisted extracts of four Arnebia species using reversed-phase thin layer chromatography. Journal of Separation Science, 32. pp. 3239-3245.