1
Published 2001
OECD Publishing

2
Published 2006
OECD Publishing

3
Published 2005
OECD Publishing

5
Published 2007
OECD Publishing

6
Published 2006
OECD Publishing

7
Published 2001
OECD Publishing

8
Published 2004
OECD Publishing

9
Published 2002
OECD Publishing

10
Published 2004
OECD Publishing

11
Published 2009
Dirección General de Tráfico

12
Published 2001
OECD Publishing

13
Published 2006
OECD Publishing

14
Published 2009
Dirección General de Tráfico

15
by Frank, Steven A.
Published 2002
Princeton University Press

16
by Brogden, Kim A.
Published 2002
ASM Press