@INPROCEEDINGS {36241,
author={F. Prudêncio and M. G. Silveirinha},
doi={},
booktitle={The 14th European Conference on Antennas and Propagation},
title={First Principles Calculation of Topological Invariants by Means of the Photonic Green’s Function  },
year={2020},
month={March},
volume={1},
pages={1-1} 
}