1. Fidler M, Xiong Y, Schoemaker R, Wilkins J, Trame M, Hooijmaijers R, Post T, Wang W (2024). _nlmixr: Nonlinear Mixed Effects Models in Population Pharmacokinetics and Pharmacodynamics_. R package version 2.0.10, .
2. Fidler M, Wilkins J, Hooijmaijers R, Post T, Schoemaker R, Trame M, Xiong Y, Wang W (2019). "Nonlinear Mixed-Effects Model Development and Simulation Using nlmixr and Related R Open-Source Packages." _CPT: Pharmacometrics & Systems Pharmacology_, *8*(9), 621-633. .
3. Schoemaker R, Fidler M, Laveille C, Wilkins J, Hooijmaijers R, Post T, Trame M, Xiong Y, Wang W (2019). "Performance of the SAEM and FOCEI Algorithms in the Open-Source, Nonlinear Mixed Effect Modeling Tool nlmixr." _CPT: Pharmacometrics & Systems Pharmacology_, *8*(12), 923-930. .
4. Using sensitivity equations for computing gradients of the FOCE and FOCEI approximations to the population likelihood
5. A Tutorial on RxODE: Simulating Differential Equation Pharmacometric Models in R