Heights of solar tracers observed at 8 mm and an interpretation of their radiation R. Brajša, I. Romštajn, H. Wöhl, A. O. Benz, M. Temmer and D. Roša A&A, 493 2 (2009) 613-621 Published online: 20 November 2008 DOI: 10.1051/0004-6361:200810299