Luminescence cross sections in the low-energy collisions of H+, H2+, and H3+ ions with H2 Ryszard Drozdowski and Andrzej Kowalski Eur. Phys. J. D, 72 12 (2018) 220 Published online: 18 December 2018 DOI: 10.1140/epjd/e2018-90234-4