Rotational excitation of HOCO+ by helium at low temperature K. Hammami, F. Lique, N. Jaïdane, Z. Ben Lakhdar, A. Spielfiedel and N. Feautrier A&A, 462 2 (2007) 789-794 Published online: 13 November 2006 DOI: 10.1051/0004-6361:20066316