Gavimath, L., and H. BB. “Trends in Population Density of House Sparrow, Passer Domesticus L in Jamakhandi Area in Bagalkot District, Karnataka, India”. Journal of Research in Biology, Vol. 6, no. 5, July 2016, pp. 2062-7, https://ojs.jresearchbiology.com/ojs1/index.php/jrb/article/view/423.