Alaee, E. , Shamsi, M. , Ahmadi, H. , Nazem, S. , Sedaaghi, M.. "Automatic Facial Skin Segmentation Using Possibilistic C-Means Algorithm for Evaluation of Facial Surgeries". World Academy of Science, Engineering and Technology, Open Science Index 90, International Journal of Computer and Information Engineering (2014), 8(6), 973 - 977.