Geomorphology of comet 67P/Churyumov–Gerasimenko - Birch, Samuel; Tang, Y.; Hayes, A.; Kirk, Randolph; Bodewitz, D.; Campins, H.; Fernandez, Y.; de Freitas Bart, R.; Kutsop, N.; Sierks, H.; Soderblom, J.; Squyres, S.; et al. (Monthly Notices of the Royal Astronomical Society, 2017)