@article{Mueller2018, author = {Christoph E. M{\"u}ller}, title = {Wirkungsbewertung mittels retrospektiver Pretests: eine kritische W{\"u}rdigung}, series = {Zeitschrift f{\"u}r Evaluation}, publisher = {Waxmann}, address = {M{\"u}nster}, pages = {221 -- 239}, year = {2018}, abstract = {.}, language = {de} }