@article{DAS_2019_a18,
     author = {Tuomas Hyt\"onen and Stefanie Petermichl and Alexander Volberg},
     title = {The sharp square function estimate with matrix weight},
     journal = {Discrete analysis},
     year = {2019},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/DAS_2019_a18/}
}