@inproceedings{daniel2016on,
title={On a generalization of $L^p$-differentiability},
author={Daniel Spector},
url={http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20170309065455733442630},
booktitle={Calc. Var. Partial Differential Equations},
volume={55},
number={3},
year={2016},
}