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Kinzler KD, Dupoux E, Spelke ES.Kinzler KD, et al. Among authors: spelke es.Proc Natl Acad Sci U S A. 2007 Jul 24;104(30):12577-80. doi: 10.1073/pnas.0705345104. Epub 2007 Jul 17.Proc Natl Acad Sci U S A. 2007.PMID: 17640881Free PMC article.
Lee SA, Spelke ES.Lee SA, et al. Among authors: spelke es.Dev Sci. 2008 Sep;11(5):743-9. doi: 10.1111/j.1467-7687.2008.00724.x.Dev Sci. 2008.PMID: 18801130