VISIR-VLT high-resolution study of the extended emission of four obscured post-AGB candidates M. W. Blanco Cárdenas, M. A. Guerrero, G. Ramos-Larios, L. F. Miranda, E. Lagadec, O. Suárez and J. F. Gómez A&A, 551 (2013) A64 Published online: 22 February 2013 DOI: 10.1051/0004-6361/201220411