2009:
soep-core-2009-pe/114 soep-core-2009-pe/115
2010:
2011:
2012:
2014:
2016:
soep-core-2016-pe/140 soep-core-2016-p-m12/140
2018:
soep-core-2018-pe-m12/167 soep-core-2018-pe/167
2020:
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