@article {VeggeSCJMR01,
	title = {Calculation of quantum tunneling for a spatially extended defect: The dislocation kink in copper has a low effective mass},
	journal = {Physical Review Letters},
	volume = {86},
	year = {2001},
	pages = {1546-1549},
	author = {Vegge, T. and Sethna, J. P. and Cheong, S. A. and Jacobsen, K. W. and Myers, C. R. and Ralph, D. C.}
}
