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Huang, B.; Qin, L.; Chu, Q.; Zhang, Q.; Gao, L.; Zheng, H., Comparison of headspace SPME with hydrodistillation and SFE for analysis of the volatile components of the roots of Valeriana officinalis var. latifolia, Chromatographia, 2009, 69, 5/6, 489-496, https://doi.org/10.1365/s10337-008-0921-y . [all data]