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- [37] PERIODIC VARIATIONS OF THE EXTRAGALACTIC H2O MASER IN NGC-4258 ASTROPHYSICAL JOURNAL, 1990, 355 (01): : L23 - L26
- [38] EVIDENCE FROM MASERS FOR A RAPIDLY ROTATING-DISK AT THE NUCLEUS OF NGC-4258 ASTROPHYSICAL JOURNAL, 1994, 432 (01): : L35 - L38
- [39] SPECTRAL EVIDENCE FOR SHOCK-IONIZED GAS ALONG THE JETS OF NGC-4258 ASTROPHYSICAL JOURNAL, 1995, 452 (02): : 613 - &