@article{https://doi.org/10.6102/zis185,
doi = {10.6102/zis185},
url = {http://zis.gesis.org/DoiId/10.6102/zis185},
author = {Kemper, C. J., Beierlein, C., Kovaleva, A., & Rammstedt, B.},
language = {deu},
title = {Skala Optimismus-Pessimismus-2 (SOP2)},
journal = {Zusammenstellung sozialwissenschaftlicher Items und Skalen (ZIS)},
publisher = {ZIS - GESIS Leibniz Institute for the Social Sciences},
year = {2014}
}