Thang , Kieu Vu, Nguyen Thanh Tung, and Ewald Janssens. 2018. “Microwave Metamaterial-Based Superlens for Energy Focusing Applications”. <i>Vietnam Journal of Science and Technology</i> 56 (6). Hanoi, VN:698-705. https://doi.org/10.15625/2525-2518/56/6/12722.