S. Selberherr, E. Langer:
"Three Dimensional Process and Device Modeling";
Microelectronics Reliability, 30 (1990), 3; 624.
http://dx.doi.org/10.1016/0026-2714(90)90512-LElectronic version of the publication:
http://www.iue.tuwien.ac.at/pdf/ib_1990/JB1990_Selberherr_3.pdf