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http://www.degruyter.com/view/j/nanoph.2014.3.issue-3/nanoph-2014-0002/nanoph-2014-0002.xml (Publisher version)
Tittl, A., Giessen, H., & Liu, N. (2014). Plasmonic gas and chemical sensing. Nanophotonics, 3(3), 157-180. doi:10.1515/nanoph-2014-0002.