Probing the ejecta of evolved massive stars in transition - A VLT/SINFONI K-band survey M. E. Oksala, M. Kraus, L. S. Cidale, M. F. Muratore and M. Borges Fernandes A&A, 558 (2013) A17 Published online: 27 September 2013 DOI: 10.1051/0004-6361/201321568