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2. Study of Ultra-High Energy Cosmic Ray composition using Telescope Array’s Middle Drum detector and surface array in hybrid mode
3. The Pierre Auger Observatory: Contributions to the 34th International Cosmic Ray Conference (ICRC 2015)(2015), 1509.03732, http://inspirehep.net/record/1393211/files/arXiv:1509.03732.pdf
4. Measurement of the Depth of Maximum of Extensive Air Showers above1018 eV
5. Report of the Working Group on the Composition of Ultra High Energy Cosmic Rays (2015), 1503.07540