A. Gorlach, X. Ni, D. A. Smirnova, D. Korobkin, D. Zhirihin, A. P. Slobozhanyuk, P. A. Belov, A. Alù, and A. B. Khanikaev. Far-Field Probing of Topological States in All-Dielectric Metasurfaces. Nature Communications, 2018, 9, 9090. (SharedIt, arxiv)