1. M. Avci, J. Geography, 13, 27 (2005).
2. F. Yaltirik, Dendrology II (Angiospermae), University of Istanbul, Faculty of Forestry, No. 3767/420, Istanbul, 1993.
3. G. Ozkan, S. Gulsoy, and K. Ozkan, 3rd International Geography Symposium, 519 (2013).
4. T. Ozcan, J. Appl. Biol. Sci., 2 (3), 51 (2008).
5. C. Bickert, W. Luhs, and W. Friedt, Ind. Crops Prod., 2, 229 (1994).