For functions whose derivatives belong to an Orlicz space, we develop their "fine" properties as a generalization of the treatment found in [MZ] for Sobolev functions. Of particular importance is Theorem 8.8, which is used in the development in [MSZ] of the coarea formula for such functions.
@article{bwmeta1.element.bwnjournal-article-doi-10_4064-sm190-1-2, author = {Jan Mal\'y and David Swanson and William P. Ziemer}, title = {Fine behavior of functions whose gradients are in an Orlicz space}, journal = {Studia Mathematica}, volume = {192}, year = {2009}, pages = {33-71}, zbl = {1176.46033}, language = {en}, url = {http://dml.mathdoc.fr/item/bwmeta1.element.bwnjournal-article-doi-10_4064-sm190-1-2} }
Jan Malý; David Swanson; William P. Ziemer. Fine behavior of functions whose gradients are in an Orlicz space. Studia Mathematica, Tome 192 (2009) pp. 33-71. http://gdmltest.u-ga.fr/item/bwmeta1.element.bwnjournal-article-doi-10_4064-sm190-1-2/