S.Ko

A Multi-Component Measurement of the Cosmic Ray Composition Between 10^{17} eV and 10^{18} eV

D.Sinclair, X.Z.Zhang, J. V. Velde, 1999, astro-ph/9911144.

Measurement of the Cosmic-Ray Energy Spectrum and Composition from 1017 to 1018.3 eV Using a Hybrid Technique

D.Sinclair, X.Z.Zhang, C. G. Larsen, 2000, astro-ph/0010652.