An upper limit to the infrared background from observations of TeV gamma rays
The Astrophysical Journal American Astronomical Society 445 (1995) 227
Outburst of TeV photons from Markarian 421
The Astrophysical Journal American Astronomical Society 438 (1995) l59
Search for ultra-high energy radiation from gamma-ray bursts
The Astrophysical Journal American Astronomical Society 426 (1994) l1
Search for Ultra--High-Energy Point-Source Emission over Various Timescales
The Astrophysical Journal American Astronomical Society 423 (1994) 714
Search for Emission of Ultra--High-Energy Radiation from Active Galactic Nuclei
The Astrophysical Journal American Astronomical Society 418 (1993) 832