@article {Mardal.2006.1,
	title = {An Observation on Korn{\textquoteright}s Inequality for Nonconforming Finite Element Methods},
	journal = {Math. Comp.},
	volume = {75},
	number = {253},
	year = {2006},
	pages = {1-6},
	author = {Mardal, Kent-Andre and Winther, Ragnar}
}
