• G. Koch, J. Schropp,  Delayed logistic indirect response models: realization of oscillating behavior. J. Pharmacokin. Pharmacodyn. (2018).
  • G. Koch, J. Schropp,  Distributed transit compartments for arbitrary lifespan distributions in aging populations. J. Theor. Biol. 380: 550-558 (2015).
  • G. Koch, W. Krzyzanski, J. J. Perez-Ruixo, J. Schropp, Modeling of delays in PKPD: classical approaches and a tutorial for delay differential equations. J. Pharmacokin. Pharmacodyn.  41:291–318 (2014).
  • G. Koch, J. Schropp J, Solution and implementation of distributed lifespan models. J Pharmacokinet Pharmacodyn 40:639–650 (2013).
  • R. J. Bauer, G. Mo, W. Krzyzanski, Solving delay differential equations in S-ADAPT by methods of steps. Computer Methods and Programs in Biomedicine 111:715-734 (2013).