@article{article1fd62015,
title   = {Electromagnetic energy within coated spheres containing dispersive metamaterials},
author = {Arruda, Tiago J. and Pinheiro, Felipe A. and Martinez, Alexandre Souto},
year = {2012},
doi = {10.1088/2040-8978/14/6/065101},
journal   = {Journal of Optics}
}