Abell 70 - Schwarz, H.E., Corradi, R.L.M., Melnick, J 1992 A&A Suppl, 96, 23 (RGB; Halpha + [OIII])
Abell 70 - Miszalski et al. 2011 - Monthly Notices of the R. A. S., Online Early (RGB; Halpha + [NII] + [OIII])
Abell 70 - Hua, C. T.; Kwok, S. - Astronomy and Astrophysics Supplement, v.138, p.275-297 (Halpha, [NII], [OIII])