Konstantinos Dimitriou, Iasonas Stavroulas, Georgios Grivas, Charalampos Chatzidiakos, Georgios Kosmopoulos, Andreas Kazantzidis, Konstantinos Kourtidis, Athanasios Karagioras, Nikolaos Hatzianastassiou, Spyros Ν. Pandis, Nikolaos Mihalopoulos, Evangelos Gerasopoulos, Intra- and inter-city variability of PM2.5 concentrations in Greece as determined with a low-cost sensor network, Atmospheric Environment,2023. DOI: https://doi.org/10.1016/j.atmosenv.2023.119713