@article {2012_7,
	title = {Spontaneous and deterministic three-dimensional curling of pre-strained elastomeric bi-strips},
	journal = {Soft Matter},
	volume = {8},
	year = {2012},
	pages = {6291-6300},
	author = {Huang, J. and Liu, J. and Kroll, B. and Bertoldi, K. and Clarke, D.R.}
}
