Berndt Farwer and K. Misra.
Modelling with hierarchical object Petri nets.
Fundamenta Informaticae, 55(2):129-147, 2003.
@article{Farwer+03g, Author = {Farwer, Berndt and Misra, K.}, Journal = {Fundamenta Informaticae}, Number = {2}, Pages = {129--147}, Title = {Modelling with Hierarchical Object {Petri} Nets}, Volume = {55}, Year = 2003 }