TY - CPAPER AU - Roohollah Kalatehjari TI - FIDING THE CRITICAL SLIP SURFACE OF A SOIL SLOPE WITH THE AID OF PARTICLE SWARM OPTIMIZATION T2 - SGEM International Multidisciplinary Scientific GeoConference EXPO Proceedings; SGEM2011 11th International Multidisciplinary Scientific GeoConference PY - 2011 DO - 10.5593/sgem2011/s02.118 PB - Stef92 Technology ER -