When an old star smolders - On the detection of hydrocarbon emission from S-type AGB stars K. Smolders, B. Acke, T. Verhoelst, J. A. D. L. Blommaert, L. Decin, S. Hony, G. C. Sloan, P. Neyskens, S. Van Eck, A. A. Zijlstra and H. Van Winckel A&A, 514 (2010) L1 Published online: 18 May 2010 DOI: 10.1051/0004-6361/201014254