A comprehensive article by UN-SPIDER in Geospatial World Magazine, April 2014, Volume 04, Issue 09. The article (page 59 ff) provides a general profile of UN-SPIDER and its role and activities as well as the importance of space-based information for disaster risk management and emergency response.
A similar article has been published in German in Mitteilungen der Fränkischen Geographischen Gesellschaft, 2014, Volume 60, pages 25-30.