By Lynch Joanna M.   Barbano David M.   Healy Patrick A.   Fleming J. Richard   in Journal of AOAC International

ISSN:1944-7922|86|4|768-774

AOAC International‎(2003)‎

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By Duggan Mark   Healy Patrick   Morton Fiona Scott   in The Journal of Economic Perspectives

ISSN:0895-3309|22|4|69-92

American Economic Association‎(2008)‎

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