Severgnini, P.; Garilli, B.; Saracco, P.; Chincarini, G. (29 Nisan 1999). "An Hα Catalogue of Galaxies in Hickson Compact Groups. I. The Sample". Astronomy and Astrophysics Supplement Series (İngilizce). 137 (3). ss. 495-504. arXiv:astro-ph/9904410 $2. Bibcode:1999A&AS..137..495S. doi:10.1051/aas:1999492.
Severgnini, P.; Garilli, B.; Saracco, P.; Chincarini, G. (29 Nisan 1999). "An Hα Catalogue of Galaxies in Hickson Compact Groups. I. The Sample". Astronomy and Astrophysics Supplement Series (İngilizce). 137 (3). ss. 495-504. arXiv:astro-ph/9904410 $2. Bibcode:1999A&AS..137..495S. doi:10.1051/aas:1999492.
Bonfanti, P.; Simien, F.; Rampazzo, R.; Prugniel, Ph. (1 Kasım 1999). "Kinematics of early-type galaxies in compact groups. HCG 67, HCG 74, and HCG 79". Astronomy and Astrophysics Supplement Series. Cilt 139. ss. 483-490. Bibcode:1999A&AS..139..483B. doi:10.1051/aas:1999513. ISSN0365-0138.
Severgnini, P.; Garilli, B.; Saracco, P.; Chincarini, G. (29 Nisan 1999). "An Hα Catalogue of Galaxies in Hickson Compact Groups. I. The Sample". Astronomy and Astrophysics Supplement Series (İngilizce). 137 (3). ss. 495-504. arXiv:astro-ph/9904410 $2. Bibcode:1999A&AS..137..495S. doi:10.1051/aas:1999492.
Bonfanti, P.; Simien, F.; Rampazzo, R.; Prugniel, Ph. (1 Kasım 1999). "Kinematics of early-type galaxies in compact groups. HCG 67, HCG 74, and HCG 79". Astronomy and Astrophysics Supplement Series. Cilt 139. ss. 483-490. Bibcode:1999A&AS..139..483B. doi:10.1051/aas:1999513. ISSN0365-0138.