@article {DANERI2014567,
	title = {Smooth approximation of bi-Lipschitz orientation-preserving homeomorphisms},
	journal = {Annales de l{\textquoteright}Institut Henri Poincare (C) Non Linear Analysis},
	volume = {31},
	number = {3},
	year = {2014},
	pages = {567 - 589},
	abstract = {<p>We show that a planar bi-Lipschitz orientation-preserving homeomorphism can be approximated in the W1,p norm, together with its inverse, with an orientation-preserving homeomorphism which is piecewise affine or smooth.</p>},
	issn = {0294-1449},
	doi = {https://doi.org/10.1016/j.anihpc.2013.04.007},
	url = {http://www.sciencedirect.com/science/article/pii/S0294144913000711},
	author = {Sara Daneri and Aldo Pratelli}
}
