http://friedenspaedagogik.de/blog/wp-content/uploads/2011/10/hb_ii_d.pdf

http://triple-v.org/edu/news/eng/ -

Making Integration Work - Leitfaden der OECD:

http://www.oecd-ilibrary.org/docserver/download/8116031e.pdf?expires=1457468115&id=id&accname=guest&checksum=C082A4E04C64F0216D692544 59F337C3