@article{Jansen:2005k8, author = "Jansen, K. and Shindler, Andrea and Urbach, Carsten and Wenger, Urs", title = "{HMC algorithm with multiple time scale integration and mass preconditioning }", doi = "10.22323/1.020.0118", journal = "PoS", year = 2005, volume = "LAT2005", pages = "118" }