Zyrichidou I., Balis D., Koukouli M.E., Drosoglou T., Bais A., Gratsea M., Gerasopoulos E., Liora N., Poupkou A., Giannaros C., Melas D., De Smedt I., Van Roozendael M., Van der A R.J., Boersma K.F., Valks P., Richter A.: Adverse results of the economic crisis: A study on the emergence of enhanced formaldehyde (HCHO) levels seen from satellites over Greek urban sites, Atmospheric Research, 224, 42-51, 2019. DOI: 10.1016/j.atmosres.2019.03.017