R. Osborne, L. Armstrong, Wasantha S. Weliange, Pathmakumara Jayasingha, A.S. Dandeniya, A.K. Prageeth P. Algiriya, and Ross E. Pogson. “Caves and Karst-Like Features in Proterozoic Gneiss and Cambrian Granite, Southern and Central Sri Lanka: An Introduction”. Acta Carsologica 42, no. 1 (September 20, 2013). Accessed July 4, 2022. https://ojs.zrc-sazu.si/carsologica/article/view/630.