@article {Simula.simula.836,
	title = {A Uniformly Stable Fortin Operator for the Taylor-Hood Element},
	journal = {Numerische Mathematik},
	volume = {123},
	number = {3},
	year = {2013},
	pages = {537-551},
	doi = {dx.doi.org/10.1007/s00211-012-0492-6},
	author = {Mardal, Kent-Andre and Schoberl, Joachim and Winther, Ragnar}
}
@techreport {Simula.simula.2086,
	title = {A Uniform Inf-Sup Condition With Applications to Preconditioning},
	year = {2012},
	publisher = {Simula},
	author = {Mardal, Kent-Andre and Schoberl, Joachim and Winther, Ragnar}
}
