Hydrogen cyanide and isocyanide in prestellar cores M. Padovani, C. M. Walmsley, M. Tafalla, P. Hily-Blant and G. Pineau des Forêts A&A, 534 (2011) A77 Published online: 05 October 2011 DOI: 10.1051/0004-6361/201117134