Please refer to the pharmacokinetics-related links below.
Pharmacokinetics – multi-compartment models – method of residuals, intercepts and slopes
Pharmacokinetics: basics
Pharmacokinetics: volume of central and tissue compartment, transfer constants and elimination rate constant from bioexponential equation
Pharmacokinetics – 2 compartments versus 3 compartments
List of PK/PD model types and descriptions