Presenting air quality status through hot spot maps realized by using Kernel Density Estimation (KDE) - case study: Craiova, 2020/2021Clementina Moldovan, Sebastian Sbirna and Liana-Simona SbirnaMATEC Web Conf., 373 (2022) 00067DOI: https://doi.org/10.1051/matecconf/202237300067