1. Preface
2. C. A. Alves et al., Atmos. Pollut. Res., 0–1 (2019).
3. A. Cincinelli and T. Martellini, Int. J. Environ. Res. Public Health, 14, 11 (2017).
4. Assessment of indoor air quality in university classrooms
5. DOSH, "Industry Code of Practice on Indoor Air Quality 2010" (Wilayah Persekutuan Putrajaya: Department of Occupational Safety and Health Malaysia, 2010).