Modelling Gradients using Petri Nets. - Laura M. F. Bertens; Jetty Kleijn; Maciej Koutny; Fons J. Verbeek (ACSD/Petri Nets Workshops, 2010)

A generic organ based ontology system, applied to vertebrate heart anatomy, development and physiology. - Laura M. F. Bertens; Joris Slob; Fons J. Verbeek (J. Integr. Bioinform., 2011)

Modeling biological gradient formation: combining partial differential equations and Petri nets. - Laura M. F. Bertens; Jetty Kleijn; Sander C. Hille; Monika Heiner; Maciej Koutny; Fons J. Verbeek (Nat. Comput., 2016)