Evans, R.; Cooper, K.; Sadler, E. (1990). "Supernova 1990K in NGC 150". International Astronomical Union Circular (5022): 1. Bibcode:1990IAUC.5022....1E.
Cappellaro, E.; Danziger, I. J.; della Valle, M.; Gouiffes, C.; Turatto, M. (1995). "The bright linear type II SN 1990K". Astronomy and Astrophysics. 293: 723–732. Bibcode:1995A&A...293..723C.