The Great Planet Debate: Science as Process
The Planet Debate Continues (Sykes 2008 - Science 319, 1765) (Abstract)
The Planet Debate Continues (Sykes 2008 - Science 319, 1765)

Erratum:

In the caption for Figure 1, the bottom objects are (L-R) Tempel 1, Eros, Kleopatra, Mathilde, Gaspra, Itokawa, Ida (and Dactyl), Wild 2