1
Published 2007
OECD Publishing

2
Published 2010
OECD Publishing

3
Published 2004
OECD Publishing

4
Published 2010
OECD Publishing

5
Published 2006
OECD Publishing

6
Published 2010
OECD Publishing

7
Published 2007
OECD Publishing

8
Published 2000
OECD Publishing

9
Published 2004
OECD Publishing

10
Published 2010
OECD Publishing

12
Published 2010
Joint Research Centre - European Commission

13
Published 2006
Korea Institute for Special Education

14
Published 2011
OECD Publishing

15
Published 2005
OECD Publishing

16
Published 1998
OECD Publishing

17
Published 2009
OECD Publishing

18
Published 2004
National Institute for Educational Policy Research

19
Published 1999
OECD Publishing

20
Published 2008
OECD Publishing