V. I. Timofeyev, M. Amini, and E. M. Faleeva, “Non-stationary Drift of Electrons in Submicron High Electron Mobility Transistor with two Heterojunctions”, ELEKTRON ELEKTROTECH, vol. 76, no. 4, pp. 33–36, Apr. 2007, doi: 10.5755/j02.eie.10713.