Terahertz hot electron bolometer waveguide mixers for GREAT P. Pütz, C. E. Honingh, K. Jacobs, M. Justen, M. Schultz and J. Stutzki A&A, 542 (2012) L2 Published online: 10 May 2012 DOI: 10.1051/0004-6361/201218916