M. Pourfath and H. Kosina, "Fast Convergent Schrödinger-Poisson Solver
for the Static and Dynamic Analysis of Carbon Nanotube Field Effect
Transistors," in Large Scale Scientific Computing (I. Lirkov,
S. Margenov, and J. Wasniewski, eds.), vol. 3743 of Lecture Notes in
Computer Science, pp. 578-585, Springer, 2006.