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- [21] B,V-PHOTOMETRY OF THE RR-LYRAE STARS IN THE VERY METAL-POOR GLOBULAR-CLUSTER NGC-5053 ASTRONOMICAL JOURNAL, 1995, 109 (02): : 618 - 638
- [22] CCD PHOTOMETRY OF RR LYRAE STARS IN THE GLOBULAR-CLUSTER M68 ASTRONOMICAL JOURNAL, 1994, 107 (02): : 622 - 630
- [23] BVI CCD PHOTOMETRY OF THE GLOBULAR-CLUSTER M4 ASTROPHYSICAL JOURNAL, 1988, 330 (02): : 569 - 578
- [24] CCD PHOTOMETRY OF THE RR-LYRAE VARIABLES IN THE LMC CLUSTER NGC-2257 AND THE ADJACENT FIELD ASTRONOMICAL JOURNAL, 1989, 98 (06): : 2086 - 2123
- [26] A SEARCH FOR DOUBLE-MODE RR-LYRAE STARS IN THE GLOBULAR-CLUSTER M68 ASTRONOMICAL JOURNAL, 1990, 99 (01): : 240 - 249
- [27] BV photometry of the RR Lyrae variables of the globular cluster M3 ASTRONOMICAL JOURNAL, 2001, 122 (06): : 3183 - 3211
- [29] ULTRAVIOLET-EXCESS OBJECTS IN THE FIELD OF NGC-6121 (M4) ASTROPHYSICAL JOURNAL, 1986, 302 (01): : 257 - 271