@inproceedings{heli2005characterization, title={Characterization of Orlicz–Sobolev space}, author={Heli Tuominen}, url={http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20170108203618543968902}, booktitle={Arkiv for Matematik}, volume={45}, number={1}, pages={123-139}, year={2005}, }