WASET
Challal, M. , Labu, F. , Dehmas, M. , Azrar, A.. "Comparative Study of Three DGS Unit Shapes and Compact Microstrip Low-Pass and Band-Pass Filters Designs". World Academy of Science, Engineering and Technology, Open Science Index 59, International Journal of Electronics and Communication Engineering (2011), 5(11), 1486 - 1490.