BibTex format
@article{Davies:2022:10.1109/TBME.2022.3145688,
author = {Davies, HJ and Bachtiger, P and Williams, I and Molyneaux, PL and Peters, NS and Mandic, D},
doi = {10.1109/TBME.2022.3145688},
journal = {IEEE Transactions on Biomedical Engineering},
title = {Wearable in-ear PPG: detailed respiratory variations enable classification of COPD},
url = {http://dx.doi.org/10.1109/TBME.2022.3145688},
volume = {69},
year = {2022}
}