Disk, merger, or outflow? Molecular gas kinematics in two powerful obscured QSOs at z ≥ 3.4 M. Polletta, N. P. H. Nesvadba, R. Neri, A. Omont, S. Berta and J. Bergeron A&A, 533 (2011) A20 Published online: 19 August 2011 DOI: 10.1051/0004-6361/201116446