Balick, B.; Brown, R. L. Intense sub-arcsecond structure in the galactic center. Astrophysical Journal. 1974-12-01, 194 (1): 265–270. Bibcode:1974ApJ...194..265B. doi:10.1086/153242.
Balick, B.; Brown, R. L. Intense sub-arcsecond structure in the galactic center. Astrophysical Journal. 1974-12-01, 194 (1): 265–270. Bibcode:1974ApJ...194..265B. doi:10.1086/153242.