id	domain	url
hassl-821	orcid.org	https://orcid.org/0000-0002-5730-9039
hassl-821	orcid.org	https://orcid.org/0000-0003-2699-4720
hassl-821	orcid.org	https://orcid.org/0000-0002-0369-4082
hassl-821	www.doi.org	https://www.doi.org/10.18488/journal.73.2019.72.74.89
hassl-821	doi.org	https://doi.org/10.1515/iral.2003.015
hassl-821	doi.org	https://doi.org/10.4304/tpls.3.1.130-134
hassl-821	doi.org	https://doi.org/10.1111/j.1540-4781.1988.tb04177.x
hassl-821	doi.org	https://doi.org/10.2307/329055
hassl-821	doi.org	https://doi.org/10.1016/0346-251x(80)90003-2
hassl-821	doi.org	https://doi.org/10.1111/j.1467-9817.1995.tb00077.x
hassl-821	doi.org	https://doi.org/10.1007/bf00401799
hassl-821	doi.org	https://doi.org/10.1598/jaal.51.2.5
hassl-821	doi.org	https://doi.org/10.3102/00346543075004531
hassl-821	doi.org	https://doi.org/10.3138/cmlr.61.1.107
hassl-821	www.oecd.org	https://www.oecd.org/pisa/pisa-2015-resultsin-focus.pdf
hassl-821	www.theguardian.com	https://www.theguardian.com/news/datablog/2013/dec/03/pisa-results-country-best-reading-maths-science
hassl-821	doi.org	https://doi.org/10.2307/329727
hassl-821	doi.org	https://doi.org/10.1093/elt/xxvii.1.48
hassl-821	doi.org	https://doi.org/10.12738/estp.2016.5.0116
hassl-821	doi.org	https://doi.org/10.1111/j.1467-1770.1971.tb00494.x
hassl-821	doi.org	https://doi.org/10.1191/1362168804lr142xx
hassl-821	www.oecd.org	http://www.oecd.org/pisa/pisa-2015-results-in-focus.pdf
hassl-821	www.oecd.org	http://www.oecd.org/pisa/pisa-2015-results-in-focus.pdf
hassl-821	www.theguardian.com	http://www.theguardian.com/news/datablog/2013/dec/03/pisa-results-country-best-reading-maths-science