Beginning of activity in 67P/Churyumov-Gerasimenko and predictions for 2014–2015C. Snodgrass, C. Tubiana, D. M. Bramich, K. Meech, H. Boehnhardt and L. BarreraA&A, 557 (2013) A33DOI: https://doi.org/10.1051/0004-6361/201322020
