Composition #4: Kim, Min Kyung., Yang, Dong-Hyug., Jung, Mihye., Jung, Eun Ha., Eom, Han Young., Suh, Joon Hyuk., Min, Jung Won., Kim, Unyong., Min, Hyeyoung., Kim, Jinwoong., Han, Sang Beom. Simultaneous determination of chromones and coumarins in Radix Saposhnikoviae by high performance liquid chromatography with diode array and tandem mass detectors . journal of chromatography a, 2011, vol. 1218, no. 37, p. 6319–6330. DOI: 10.1016/j.chroma.2011.06.103.
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