1. Sa,TIIER,52, No. 7, 849 (1964).
2. P. O. Lauritzen,Solid State Electron.,8, No. 1, 45 (1965).
3. M. B. Das and J. M. Moore,IEEE Trans.,ED-21, No. 4, 247 (1974).
4. S. M. Liu and M. B. Das, UGIM-83, Proc. 5th Bien. Gov. Ind. Microelectron. Symp., College Station, Texas, May 25?27, 1983, p. 169.
5. C. Su, H. Rohdin, and C. Stalte, Int. Electron. Dev. Meeting, Washington, DC, December 5?7, 1983, Techn. Dig., p. 601.