@conference{matsumura2008ultra, title = {Ultra-Thin Micro-Loudspeaker Using Oblique Magnetic Circuit.}, author = {Matsumura, Toshiyuki and Saiki, Shuji and Sano, Koji and Usuki, Sawako}, booktitle = {Audio Engineering Society Convention 124}, month = {May}, year = {2008}, url = {https://www.aes.org/e-lib/browse.cfm?elib=14472} }