@article{Waltner2018, author = {Waltner, Eva-Maria and Rieß, Werner and Brock, Antje}, year = {2018}, language = {eng}, copyright = {https://creativecommons.org/licenses/by/4.0/}, title = {Development of an ESD Indicator for Teacher Training and the National Monitoring for ESD Implementation in Germany}, volume = {10}, issn = {2071-1050}, url = "http://dx.doi.org/10.17169/refubium-354", }