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Relativistic solar protons in the ground level event of 23 February 1956: New study
Unexpected burst of solar activity recorded by neutron monitors during October–November 2003
A study of the ground level enhancement of 23 February 1956
The structure of the solar cycle maximum phase in the galactic cosmic ray 11-year variation
The Los-Angeles Automated Traffic Surveillance and Control (ATSAC) System
An achromatic collimator for a multi-window flight simulator