CRIRES-VLT high-resolution spectro-astrometry as a tool in the search for disks inside the cores of planetary nebulaeM. W. Blanco Cárdenas, H. U. Käufl, M. A. Guerrero, L. F. Miranda and A. SeifahrtA&A, 566 (2014) A133DOI: https://doi.org/10.1051/0004-6361/201322564