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- [3] VLBI OBSERVATIONS OF THE DOUBLE QUASAR 0957+561 ASTROPHYSICAL JOURNAL, 1981, 243 (02): : L57 - L59
- [4] IS THE DOUBLE QUASAR QSO 0957+561 A, B GRAVITATIONAL LENS USPEKHI FIZICHESKIKH NAUK, 1981, 133 (04): : 729 - 732
- [5] Ultraviolet structure in the lensed QSO 0957+561 ASTRONOMICAL JOURNAL, 2003, 126 (01): : 24 - 28
- [7] Photometric monitoring of the lensed QSO 0957+561 ASTROPHYSICAL APPLICATIONS OF GRAVITATIONAL LENSING, 1996, (173): : 53 - 54
- [9] A large brightness enhancement of the QSO 0957+561 A component ASTROPHYSICAL JOURNAL, 2002, 573 (01): : L1 - L4
- [10] CCD BRIGHTNESS MONITORING OF THE TWIN QSO 0957+561 ASTROPHYSICAL JOURNAL, 1984, 277 (02): : 481 - 484