1. A grazing ecosystem in the Serengeti;Bell;Scient. Am.,1971
2. An ecological reconnaissance of Wilpattu National Park, Ceylon;Eisenberg;Smithson. Contr. Zool.,1972
3. Ecological studies on populations of elephants in the Gal Oya Area in relation to distribution, habitat preferences, competition and food availability;Ishwaran,1979
4. Remarks on social structure and ecology of the Ceylon elephant in the Yala National Park;Kurt,1974