How are the EUV and radio polar limb-brightenings correlated? C. L. Selhorst, C. G. Giménez de Castro, A. C. Varela Saraiva and J. E. R. Costa A&A, 509 (2010) A51 Published online: 15 January 2010 DOI: 10.1051/0004-6361/200912320