Chang, Victor; Ni, Pin; Li, Yuming; (2020) K-Clustering Methods for Investigating Social-Environmental and Natural-Environmental Features Based on Air Quality Index. IT Professional , 22 (4) pp. 28-34. 10.1109/MITP.2020.2993851 <https://doi.org/10.1109/MITP.2020.2993851>. Green open access