F. Piron, R. Bazer-Bachi, L-M. Chounet, G. Debiais, B. Degrange, et al.. Observations of gamma-ray emission from the blazar Markarian 421 above 250 GeV with the CAT cherenkov imaging telescope.
International Cosmic Ray Conference 26, Aug 1999, Salt Lake City, United States. pp.326.
⟨in2p3-00005760⟩