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Barton, Elizabeth; Geller, Margaret; Ramella, Massimo; Marzke, Ronald O.; Da Costa, L. Nicolaci (1996). "Compact Group selection from Redshift Surveys". The Astronomical Journal. 112: 871. arXiv:astro-ph/9608091. Bibcode:1996AJ....112..871B. doi:10.1086/118060.
Barton, Elizabeth; Geller, Margaret; Ramella, Massimo; Marzke, Ronald O.; Da Costa, L. Nicolaci (1996). "Compact Group selection from Redshift Surveys". The Astronomical Journal. 112: 871. arXiv:astro-ph/9608091. Bibcode:1996AJ....112..871B. doi:10.1086/118060.
Barton, Elizabeth; Geller, Margaret; Ramella, Massimo; Marzke, Ronald O.; Da Costa, L. Nicolaci (1996). "Compact Group selection from Redshift Surveys". The Astronomical Journal. 112: 871. arXiv:astro-ph/9608091. Bibcode:1996AJ....112..871B. doi:10.1086/118060.