Measurements of the near-nucleus coma of comet 67P/Churyumov-Gerasimenko with the Alice far-ultraviolet spectrograph on Rosetta
Paul D. Feldman, Michael F. A’Hearn, Jean-Loup Bertaux, Lori M. Feaga, Joel Wm. Parker, Eric Schindhelm, Andrew J. Steffl, S. Alan Stern, Harold A. Weaver, Holger Sierks and Jean-Baptiste Vincent