The abundance of HCN in circumstellar envelopes of AGB stars of different chemical typeF. L. Schöier, S. Ramstedt, H. Olofsson, M. Lindqvist, J. H. Bieging and K. B. MarvelA&A, 550 (2013) A78DOI: https://doi.org/10.1051/0004-6361/201220400
