@conference{111061, author = {Erich Grossman and Charles Dietlein and A. Luukanen}, title = {Terahertz circular variable filters}, year = {2006}, number = {WPP-258}, month = {2006-02-15}, publisher = {ESA Workshop on Millimetre-wave Technology and Applications, Espoo, FI}, url = {https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=32224}, language = {en}, }