Author(s): Ali Hafez El-Far1, Hazem Mohammed Shaheen2, Mohammed Abd El-Daim3, Soad K Al Jaouni4 and Jamshid Shaker A Mousa5
Author(s): Stanislava Grozeva, Velichka Rodeva, Velichka Todorova
Author(s): Chongyun Fu, Yuanyuan Li1, Yuping Wang, Yuqing Ma, Jingtao Hu, Shigui Li.