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Fan Y, Feng YQ, Da SL, Feng PY.Fan Y, et al. Among authors: feng yq, feng py.Anal Sci. 2003 May;19(5):709-14. doi: 10.2116/analsci.19.709.Anal Sci. 2003.PMID: 12769370Free article.
Zhang W, He H, Feng Y, Da S.Zhang W, et al. Among authors: feng y.J Chromatogr B Analyt Technol Biomed Life Sci. 2003 Dec 25;798(2):323-31. doi: 10.1016/j.jchromb.2003.10.005.J Chromatogr B Analyt Technol Biomed Life Sci. 2003.PMID: 14643513
Xu L, Feng YQ, Shi ZG, Da SL, Ren YY.Xu L, et al.J Chromatogr A. 2004 Feb 27;1028(1):165-70. doi: 10.1016/j.chroma.2003.11.085.J Chromatogr A. 2004.PMID: 14969290