BibTex format
@article{Zhang:2017:10.1103/PhysRevB.96.035430,
author = {Zhang, Y-L and Pendry, JB and Lei, DY},
doi = {10.1103/PhysRevB.96.035430},
journal = {PHYSICAL REVIEW B},
title = {Radial anisotropy from a geometric viewpoint: Topological singularity and effective medium realization},
url = {http://dx.doi.org/10.1103/PhysRevB.96.035430},
volume = {96},
year = {2017}
}