@ARTICLE {29690,
author={J.  Nobre and R. Neves},
doi={10.1016/j.eswa.2019.01.083},
journal={Expert Systems with Applications},
title={Combining principal component analysis, discrete wavelet transform and XGBoost to trade in the financial markets},
year={2019},
month={July},
volume={125},
number={1},
pages={181-194},
ISSN={0957-4174}
}