Search for hydrogen-helium molecular species in space E. Zicler, O. Parisel, F. Pauzat, Y. Ellinger, M.-C. Bacchus-Montabonel and J.-P. Maillard A&A, 607 (2017) A61 Published online: 13 November 2017 DOI: 10.1051/0004-6361/201731441