Snodgrass, William; Hafez, Walid; Harff, Nathan; Feng, Milton (2006). "Pseudomorphic InP/InGaAs Heterojunction Bipolar Transistors (PHBTS) Experimentally Demonstrating fT = 765 GHZ at 25 °C Increasing to fT = 845 GHZ at -55 °C". 2006 International Electron Devices Meeting (IEDM '06). 2006 IEEE International Electron Devices Meeting. December 10–13, 2006. San Francisco, CA. pp. 1–4. doi:10.1109/IEDM.2006.346853. ISBN1-4244-0438-X. S2CID27243567.
Snodgrass, William; Hafez, Walid; Harff, Nathan; Feng, Milton (2006). "Pseudomorphic InP/InGaAs Heterojunction Bipolar Transistors (PHBTS) Experimentally Demonstrating fT = 765 GHZ at 25 °C Increasing to fT = 845 GHZ at -55 °C". 2006 International Electron Devices Meeting (IEDM '06). 2006 IEEE International Electron Devices Meeting. December 10–13, 2006. San Francisco, CA. pp. 1–4. doi:10.1109/IEDM.2006.346853. ISBN1-4244-0438-X. S2CID27243567.