@article{Giacinti:2016i8, author = "Giacinti, Gwenael and Bell, A. R.", title = "{The Onset of Cosmic Ray Acceleration at Supernovae: From Shock Breakout to the First Decades }", doi = "10.22323/1.236.0519", journal = "PoS", year = 2016, volume = "ICRC2015", pages = "519" }