Javadzadeh, R. , Javadzadeh, E.. "Locating Critical Failure Surface in Rock Slope Stability with Hybrid Model Based on Artificial Immune System and Cellular Learning Automata (CLA-AIS)". World Academy of Science, Engineering and Technology, Open Science Index 59, International Journal of Geotechnical and Geological Engineering (2011), 5(11), 637 - 640.