@Article{ar-2026-22,
AUTHOR = {Lopez-Encuentra, A. and Gil Cid, E. and Pozo Coronado, L. M.},
TITLE = {Inhalation of small particles (PM2.5) in urban road tunnels and underground Madrid (Spain). A citizen science project},
JOURNAL = {Aerosol Research Discussions},
VOLUME = {2026},
YEAR = {2026},
PAGES = {1--21},
URL = {https://ar.copernicus.org/preprints/ar-2026-22/},
DOI = {10.5194/ar-2026-22}
}