Simultaneous x-ray and TeV gamma-ray observation of the TeV blazar Markarian 421 during 2000 February and May - Krawczynski, Henric; Sambruna, Rita M.; Kohnle, A.; Coppi, P. S.; Aharonian, Felix A.; Bernlöhr, Konrad; Heinzelmann, G.; Hermann, G.; Hofmann, Werner; Horns, D.; Ibarra, A.; Konopelko, Alexander; et al. (The astrophysical journal, 2001)
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