@article {KarthaCKS91,
	title = {Spin-glass nature of tweed precursors in martensitic transformations},
	journal = {Physical Review Letters},
	volume = {67},
	year = {1991},
	pages = {3630-3633},
	author = {Kartha, S. and Castan, T. and Krumhansl, J. A. and Sethna, J. P.}
}
