@misc{indriolo2007diffuse, title={H3+ in Diffuse Interstellar Clouds: a Tracer for the Cosmic-Ray Ionization Rate}, author={Nick Indriolo and Thomas R. Geballe and Takeshi Oka and Benjamin J. McCall}, year={2007}, eprint={0709.1114}, archivePrefix={arXiv}, primaryClass={astro-ph}, doi={10.1086/523036}, url={https://arxiv.org/abs/0709.1114} }