1. M. Unger and E. J. Ahn, “Inferences about the Mass Composition of Cosmic Rays fromData on the Depth of Maximum at the Auger Observatory,” in Proceedings of the 33rd International Cosmic Ray Conference, Rio de Janeiro, 2013; http://wwwcbpfbr/icrc2013/papers/icrc2013-0690pdf.
2. A. Schulz, “The measurement of the Energy Spectrum of Cosmic Rays above 3 · 1017 eV with the Pierre Auger Observatory,” in Proceedings of the 33rd International Cosmic Ray Conference, Rio de Janeiro, 2013; http://wwwcbpfbr/icrc2013/papers/icrc2013-0769pdf.
3. Y. Tsunesada, “Collaboration for The Telescope Array. Telescope Array Composition Measurements,” in Proceedings of the 33rd International Cosmic Ray Conference, Rio de Janeiro, 2013; http://wwwcbpfbr/icrc2013/papers/icrc2013-0132pdf.
4. D. Bergman, “Collaboration for The TA/TALE. Telescope Array Measurements of the UHECR Energy Spectrum,” in Proceedings of the 33rd International Cosmic Ray Conference, Rio de Janeiro, 2013; http://wwwcbpfbr/icrc2013/papers/icrc2013-0221pdf.
5. A. Ivanov, “The Yakutsk Array Experiment: Main Results and Future Directions,” EPJ Web of Conferences 53, 04003 (2013); URL: http://dxdoiorg/10.1051/epjconf/20135304003.