@ARTICLE{Kempa_K._Negative_2009, author={Kempa, K. and Rose, A.}, volume={vol. 57}, number={No 1}, journal={Bulletin of the Polish Academy of Sciences Technical Sciences}, pages={35-39}, howpublished={online}, year={2009}, title={Negative refraction of photonic and polaritonic waves in periodic structures}, URL={http://www.czasopisma.pan.pl/Content/105823/PDF/02_paper.pdf}, doi={10.2478/v10175-010-0102-7}, }