Hacıyakupoğlu, S., T.A. Ertek, D. E. Walling, E.A. Erginal, G. Karahan, F. Gökbulak, D. Tolunay, H. Saygın, A. Hızal, M. Kaya, M. S. Kızıltaş. 2005. Use of fallout radionuclides measurements for sustainable watershed management in Eastern and Western sites of İstanbul. Proceedings International Conference on Forest Impact on Hydrological Processes and Soil Erosion. 5-8 October, 2005. Yundola, Bulgaria.