^Scodeggio, Marco; Boselli, Alessandro; Gavazzi, Giuseppe; Trinchieri, Ginevra; Garilli, Bianca (1992-08-01). "Multifrequency windows on spiral galaxies. II - The A262 and Cancer clusters". Astronomy and Astrophysics Supplement Series. 94: 299–326. Bibcode:1992A&AS...94..299S. ISSN0365-0138.
^Butcher, H. R.; Oemler, A. Jr. (1985-04-01). "The evolution of galaxies in clusters. IV - Photometry of 10 low-redshift clusters". The Astrophysical Journal Supplement Series. 57: 665–691. Bibcode:1985ApJS...57..665B. doi:10.1086/191022. ISSN0067-0049.
^Fanti, C.; Fanti, R.; Feretti, L.; Ficarra, A.; Gioia, I. M.; Giovannini, G.; Gregorini, L.; Mantovani, F.; Marano, B. (1982-01-01). "Radio and optical observations of 9 nearby Abell clusters - A262, A347, A569, A576, A779, A1213, A1228, A2162, A2666". Astronomy and Astrophysics. 105: 200–218. Bibcode:1982A&A...105..200F. ISSN0004-6361.