Abell 63 - Mitchell et al. - Monthly Notices of the Royal Astronomical Society Vol. 374 (Ha)
Abell 63 - Don Pollacco Astronomical Society of the Pacific, 2004 (Ha)
Abell 63 - A. Manchado, M.A. Guerrero, L. Stanghellini, M. Serra-Ricart, 1996, ed. IAC (Ha + [OIII])