Dissipative structures of diffuse molecular gas - I. Broad HCO+ (J = 1–0) emission E. Falgarone, G. Pineau des Forêts, P. Hily-Blant and P. Schilke A&A, 452 2 (2006) 511-522 Published online: 22 May 2006 DOI: 10.1051/0004-6361:20054087