G. Giuricin; C. Marinoni; L. Ceriani; A. Pisani (2000). «Nearby Optical Galaxies: Selection of the Sample and Identification of Groups». Astrophysical Journal543 (1): 178–194. doi:10.1086/317070. Bibcode: 2000ApJ...543..178G.
G. Giuricin; C. Marinoni; L. Ceriani; A. Pisani (2000). «Nearby Optical Galaxies: Selection of the Sample and Identification of Groups». Astrophysical Journal543 (1): 178–194. doi:10.1086/317070. Bibcode: 2000ApJ...543..178G.