@article{XU2019679,
title = "Sparse, collaborative, or nonnegative representation: Which helps pattern classification?",
journal = "Pattern Recognition",
volume = "88",
pages = "679 - 688",
year = "2019",
issn = "0031-3203",
doi = "https://doi.org/10.1016/j.patcog.2018.12.023",
url = "http://www.sciencedirect.com/science/article/pii/S003132031830445X",
author = "Jun Xu and Wangpeng An and Lei Zhang and David Zhang",
}