Static and transient latchup simulation of VLSI-CMOS with an improved physical design model :

http://ieeexplore.ieee.org/document/1486794/

https://www.semanticscholar.org/paper/Static-and-transient-latchup-simulation-of-VLSI-CM-Strzempa-Depre-Harter/ca68aeddf5d5c42ddbe63c6afdc223b3af1eb5a6