@unpublished{TUW-231921, author = {Enenkel, Markus}, title = {Joining forces for food security - linking earth observation and crowd-sourcing}, year = {2014}, note = {talk: International Symposium on Weather and Climate Extremes, Food Security and Biodiversity 2014, Fairfax, Virginia, USA; 2014-10-20 -- 2014-10-23} }