Hisamoto, D.; Kaga, T.; Kawamoto, Y.; Takeda, E. (December 1989). "A fully depleted lean-channel transistor (DELTA)-a novel vertical ultra thin SOI MOSFET". International Technical Digest on Electron Devices Meeting. pp. 833–836. doi:10.1109/IEDM.1989.74182. S2CID114072236.
Hisamoto, D.; Kaga, T.; Kawamoto, Y.; Takeda, E. (December 1989). "A fully depleted lean-channel transistor (DELTA)-a novel vertical ultra thin SOI MOSFET". International Technical Digest on Electron Devices Meeting. pp. 833–836. doi:10.1109/IEDM.1989.74182. S2CID114072236.