@conference{suwa1975vertical, title = {Vertical Field Effect Transistor and Its Application to High Fidelity Audio Amplifiers}, author = {Suwa, Hisashi and Ishitani, Akiyasu}, booktitle = {Audio Engineering Society Convention 51}, month = {May}, year = {1975}, url = {https://www.aes.org/e-lib/browse.cfm?elib=2415} }