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- [34] A MOLECULAR SPIRAL ARM SEGMENT OF M51 AT 3.5 ARCSECOND RESOLUTION ASTROPHYSICAL JOURNAL, 1993, 404 (02): : 593 - 601
- [38] Water maser emission from the active nucleus in M51 ASTROPHYSICAL JOURNAL, 2001, 560 (01): : L37 - L40
- [40] STRUCTURE OF SMALL SOURCES IN M51 AT 2695 MHZ ASTROPHYSICAL JOURNAL, 1972, 176 (03): : L101 - &