1. The cosmic-ray energy spectrum observed by the Fly's Eye
2. T. Abu Zayad et al., Measurement of the Flux of Ultra High Energy Cosmic Rays from Monocular Observations by the High Resolution Fly's Eye Experiment, submitted to Phys. Rev. Lett
3. T. Abu Zayad et al., Measurement of the Spectrum of UHE Cosmic Rays by the HiRes Experiment, submitted to Ap. J
4. End to the Cosmic-Ray Spectrum?