Larsen S S, Richtler T Astron. Astrophys.345 59 (1999)
Elmegreen B G, Efremov Yu N, Larsen S S Astrophys. J.535 748 (2000)
Paczynski B, astro-ph/9909048; to be publ. in The Largest Explosions Since the Big Bang: Supernovae and Gamma Ray Bursts (Eds M Livio, K Sahu, N Panagia, Cambridge: Cambridge Univ. Press, 1999)
Postnov K A, Prokhorov M E, Lipunov V M, astro-ph/9908136
Cole A A et al. Astron. J.114 1945 (1997)
Davis M B, in IAU Symp.174 (Eds P Hut, J Makino, Dordrecht: Kluwer, 1995) p. 243
Fryer C, Kalogera V Astrophys J.489 244 (1997)
Portegies Zwart S, McMillan S L W Astrophys. J.528 L17 (2000)
Milgrom M, Usov V V, astro-ph/0001283 (submitted to Astrophys. J. Lett.)