The Atacama Pathfinder EXperiment (APEX) – a new submillimeter facility for southern skies – R. Güsten, L. Å. Nyman, P. Schilke, K. Menten, C. Cesarsky and R. Booth A&A, 454 2 (2006) L13-L16 Published online: 11 July 2006 DOI: 10.1051/0004-6361:20065420