Grześkiewicz, B., et al. “SU-8 Based Planar Metamaterials With Fourfold Symmetry As Selective Terahertz Absorbers”. Opto-Electronics Review, vol. 26, no. 4, Apr. 2026, pp. 329-37, https://wydawnictwo.pan.pl/index.php/opelre/article/view/709.