Kaskaoutis D.G., Grivas G., Liakakou E., Kalivitis N., Kouvarakis G., Stavroulas I., Kalkavouras P., Zarmpas P., Dumka U.C., Gerasopoulos E., Mihalopoulos N., Assessment of the COVID-19 Lockdown Effects on Spectral Aerosol Scattering and Absorption Properties in Athens, Greece, Atmosphere, 12 (2), 2021. DOI: 10.3390/atmos12020231