@inproceedings{Helder:2011wE, author = "Helder, Eveline and Vink, Jacco", title = "{Cosmic-ray acceleration efficiency of the supernova remnants RCW 86 and SNR 0509-67.5}", doi = "10.22323/1.123.0142", booktitle = "Proceedings of 25th Texas Symposium on Relativistic Astrophysics {\textemdash} PoS(Texas 2010)", year = 2011, volume = "123", pages = "142" }