Hany A. Atallah, Talal Awad Al-Otaibi, Mahmoud M. A. El- Negm, Adel B. Abdel-Rahman,. 2019. “A Novel Efficient Design for Wireless Power Transfer Employing T-Slot Defected Ground Structure”. International Journal of Advanced Science and Technology 28 (16), 1759 -. https://sersc.org/journals/index.php/IJAST/article/view/2187.