Searching for chameleon-like scalar fields with the ammonia method - II. Mapping of cold molecular cores in NH3 and HC3N linesS. A. Levshakov, A. V. Lapinov, C. Henkel, P. Molaro, D. Reimers, M. G. Kozlov and I. I. AgafonovaA&A, 524 (2010) A32DOI: https://doi.org/10.1051/0004-6361/201015332