Bonev, B. P., Villanueva, G. L., DiSanti, M. A., Böhnhardt, H., Lippi, M., Gibb, E. L., et al. (2017). Beyond 3 au from the Sun: The Hypervolatiles CH4, C2H6, and CO in the Distant Comet C/2006 W3 (Christensen). Astronomical Journal, 153: 241. doi:10.3847/1538-3881/aa64dd.