1. Yu. P. Pskovskii, Sov.Astron. 21, 675 (1977a).
2. Yu. P. Pskovskii, Sov.Astron. 21, 675 (1977b).
3. M. M. Phillips, Astrophys. J. Lett. 413, L105 (1993).
4. B. Leibundgut, Nucl. Phys. A 688, 1 (2001).
5. M. M. Phillips, in 1604-2004: Supernovae as Cosmological Lighthouses, Ed. by M. Turatto et al., Astron. Soc. Pacif. Conf. Ser. 342, 211 (2005).