@unpublished{TUW-213268, author = {Wagner, Wolfgang}, title = {Long-term soil moisture monitoring over Europe using scatterometers: from ERS-1 to METOP-B}, year = {2012}, note = {invited; talk: Groundwater Modeling and Remote Sensing Symposium, Groundwater Modeling and Remote Sensing Symposium, Deltares/TNO, Utrecht,; 2012-12-14} }