Lammert Kooistra Sirpa Thessler Arnold Bregt User Requirements and Future Expectations for Geosensor Networks - An Assessment. 149-157 2009 GSN http://dx.doi.org/10.1007/978-3-642-02903-5_15 conf/gsn/2009 db/conf/gsn/gsn2009.html#KooistraTB09