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- [24] GAS MOTIONS IN NUCLEUS OF SEYFERT-GALAXY NGC-4151 ASTROPHYSICAL JOURNAL, 1973, 181 (01): : 51 - 59
- [29] NGC 4151: Infrared variability ASTRONOMY LETTERS-A JOURNAL OF ASTRONOMY AND SPACE ASTROPHYSICS, 1997, 23 (06): : 709 - 712