Frattare, L. M.; Zurek, D. R. (1997). "The Discovery of a Possible Luminous Blue Variable in NGC 4414". American Astronomical Society, 194th AAS Meeting, #82.02; Bulletin of the American Astronomical Society. 31: 967. Bibcode:1999AAS...194.8202F.
Braine, J.; Combes, F.; van Driel, W. (1993). "NGC 4414: A flocculent galaxy with a high gas surface density". Astronomy and Astrophysics. 280 (2): 451–467. Bibcode:1993A&A...280..451B.
Burgat, W. (1974). "Supernovae". International Astronomical Union Circular (2664): 1. Bibcode:1974IAUC.2664R...1B.
Ciabattari, F.; Mazzoni, E.; Donati, S.; Petroni, G.; Foglia, S.; Galli, G.; Cenko, S. B.; Clubb, K. I.; Zheng, W.; Kelly, P. L.; Filippenko, A. V.; Van Dyk, S. D. (2013). "Supernova 2013df in NGC 4414 = PSN J12262933+3113383". Central Bureau Electronic Telegrams. 3557: 1. Bibcode:2013CBET.3557....1C.