Mehmood, Khalid, Bao, Yansong, Saifullah,, Cheng, Wei, Khan, Muhammad Ajmal, Siddique, Nadeem, Abrar, Muhammad Mohsin, Soban, Ahmad, Fahad, Shah, Naidu, Ravi. Elsevier; 2022. Predicting the quality of air with machine learning approaches: Current research priorities and future perspectives.