Time variability and heterogeneity in the coma of 67P/Churyumov-GerasimenkoM. Hässig, P. Wurz, K. Altwegg et al.|Science|2015Cited by 262
Images of Asteroid 21 Lutetia: A Remnant Planetesimal from the Early Solar SystemH. Sierks, C. Snodgrass, H. Rickman et al.|Science|2011Cited by 213