It seems you're asking about (likely a typo or shorthand for PSpice or a specific tool/library). However, there is no widely known simulation or academic concept called "PSpiso."
If you meant (a popular SPICE simulator for electronic circuits), here is a highly useful and classic paper that provides both theory and practical guidance: Title: "SPICE2: A Computer Program to Simulate Semiconductor Circuits" Authors: L. W. Nagel, D. O. Pederson Institution: University of California, Berkeley (Electronics Research Laboratory) Year: 1973 (Report No. ERL-M520) pspiso
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