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active galactic nuclei (1) |
blazars (1) |
galaxies: active (1) |
galaxies: individual (bl lacertae, ver j2202+422) (1) |
gamma rays: galaxies (1) |
high-frequencies (1) |
multiwavelength observations (1) |
pks 1222+216 (1) |
polarimetric observations (1) |
radio-sources (1) |