@article{assessingthelockdowneffectsonairquality,
  title = {Assessing the Lockdown Effects on Air Quality during COVID-19 Era},
  author = {Ioannis Kavouras and Eftychios Protopapadakis and Maria Kaselimia and Emmanuel Sardis and Nikolaos Doulamis},
  year = {2021},
  eprint = {2106.13750},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2106.13750v1},
}