Perlmutter, S.; Pennypacker, C.; Carlson, S.; Hamilton, N.; Marvin, H.; Muller, R.; Smith, C. (1991). "Supernova 1991B in NGC 5426". International Astronomical Union Circular (5163): 1. Bibcode:1991IAUC.5163....1P.
Monard, L. A. G.; Brimacombe, J.; Jacques, C.; Pimentel, E. (2009). "Supernova 2009mz in NGC 5426". Central Bureau Electronic Telegrams. 2096: 1. Bibcode:2009CBET.2096....1M.
Searle, L.; Wade, R.; Oke, J. B. (1976). "Supernova in NGC 5427". International Astronomical Union Circular (2984): 1. Bibcode:1976IAUC.2984....1S.