H. Shafaattalab Dehghani and H. R. Zarei , Identifying Karst Pattern to Prevent Bell Spring from Being Submerged in Daryan Dam Reservoir . journal = {International Journal of Geological and Environmental Engineering}, [online]. World Academy of Science, Engineering and Technology. March 2016, vol. 113(5). 531 - 540 [viewed 26 April 2024]. Available from: https://publications.waset.org/pdf/10004360.