P Y, J S, C Z, R Y, X L, Y Z, S Y, M P.  2010.  HPLC-DAD separation and determination of major active constituents in an important Tibetan medicine Meconopsis quintuplinervia from different regions of Qinghai-Tibet Plateau. J. Med. Plant Res. Journal of Medicinal Plant Research. 4(11):1053-1058.