@article{white2009wide, title = {Wide-Range Electrostatic Loudspeaker with a Zero-Free Polar Response}, author = {White, D. R.}, journal = {J. Audio Eng. Soc}, volume = {57}, number = {10}, pages = {822--831}, year = {2009}, url = {https://www.aes.org/e-lib/browse.cfm?elib=14844} }