K. S. Veesa, C. S. Dimmala, O. J. H. Antipas, V. R. Mohan, and S. M. John, “Drinking water practices and sanitation in slums of Visakhapatnam, Andhra Pradesh a developing smart city in India”, Int J Community Med Public Health, vol. 3, no. 11, pp. 3188–3194, Dec. 2016.