Why did Comet 17P/Holmes burst out? - Nucleus splitting or delayed sublimation? W. J. Altenhoff, E. Kreysa, K. M. Menten, A. Sievers, C. Thum and A. Weiss A&A, 495 3 (2009) 975-978 Published online: 20 January 2009 DOI: 10.1051/0004-6361:200810458