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Frey BS, Savage DA, Torgler B.Frey BS, et al.Proc Natl Acad Sci U S A. 2010 Mar 16;107(11):4862-5. doi: 10.1073/pnas.0911303107. Epub 2010 Mar 1.Proc Natl Acad Sci U S A. 2010.PMID: 20194743Free PMC article.
Osterloh M, Frey BS.Osterloh M, et al. Among authors: frey bs.Eval Rev. 2015 Feb;39(1):102-29. doi: 10.1177/0193841X14524957. Epub 2014 Aug 4.Eval Rev. 2015.PMID: 25092865Review.
Jackson S , Frey BS , Bates MN , Swiner DJ , Badu-Tawiah AK .Jackson S , et al. Among authors: frey bs.Analyst. 2020 Aug 21;145(16):5615-5623. doi: 10.1039/d0an00857e. Epub 2020 Jul 7.Analyst. 2020.PMID: 32633747Free PMC article.