1. Abdul-Wahab, S. A., Bakheit, C. S., & Al-Alawi, S. M. (2005). Principal component and multiple regression analysis in modelling of ground-level ozone and factors affecting its concentrations. Environmental Modelling & Software, 20, 1263.
2. Anusha, N., & Sen, D. (2021). Impact of physicochemical characteristics of wastewater on nitrogen dynamics: A case study in Kolkata, India. Water Utility Journal, EWRA, 27(1), 27–36.
3. APHA. (2005). Standard Methods for the Examination of Water and Wastewater (21st ed.). Washington DC: American Public Health Association/American Water Works Association/Water Environment Federation.
4. Arabie, P., Aldenderfer, M. S., Carroll, D., & DeSarbo, W. S. (1987). Three way scaling: A guide to multidimensional scaling and clustering 65.
5. Bandyopadhyay, B. (2011). Ecosystem of East Calcutta Wetlands as an example of environmental protection in India. Presented at the Sustaining Commons: Sustaining Our Future, the Thirteenth Biennial Conference of the International Association for the Study of the Commons, Hyderabad, India.