Distribution and excitation of thermal methanol in 6.7 GHz maser bearing star-forming regions - I. The nearby source Cepheus AK. J. E. Torstensson, F. F. S. van der Tak, H. J. van Langevelde, L. E. Kristensen and W. H. T. VlemmingsA&A, 529 (2011) A32DOI: https://doi.org/10.1051/0004-6361/200913256
