4Heckman, J. 2006. The Technology and Neuroscience of Skill Formation. Presented at Invest in Kids Working Group, Center for Economic Development, Partnership for America's Economic Success, July 17. http://www.ced.org/projects/kids. shtml#meetings.
5Schweinhart, Lawrence J.Outcomes of the High/Scope Perry preschool Study and Michigan School Readiness Program. in Ed. Mary Eming Young.Early Child Development From Measurement to Action: A Priority for Growth and Equity. International Bank for Reconstruction/World Bank, Wasshington, D.C. 2007: 67-80.
6UNESCO EFA global monitoring report 2007. Strong foundations: early childhood care and education. Published in 2006 by the United Nations Educational, Scientific and Cultural Organization,7, Place de Fontenoy, 75352 Paris 07 SP, France.