Rights:
© 2011 American Physical Society (APS). This is the accepted version of the following article: Voutilainen, J. & Fay, A. & Häkkinen, P. & Viljas, J. K. & Heikkilä, T. T. & Hakonen, Pertti J. 2011. Energy relaxation in graphene and its measurement with supercurrent. Physical Review B. Volume 84, Issue 4. 045419/1-10. ISSN 1098-0121 (printed). DOI: 10.1103/physrevb.84.045419, which has been published in final form at http://journals.aps.org/prb/abstract/10.1103/PhysRevB.84.045419.