@article{Barranco1999,
author = {Barranco, J. and Wisler, D.},
title= {Validity and systematicity of newspaper data in event analysis},
year = {1999},
doi = {10.1093/oxfordjournals.esr.a018265},
URL = {https://doi.org/10.1093/oxfordjournals.esr.a018265},
volume = {15},
number = {3},
pages = {301--322},
}