Sara Porat, Michael Yoeli. Towards a Hierarchy of Nets. J. Comput. Syst. Sci., 29(2):198-206, 1984.
@article{PoratY84, title = {Towards a Hierarchy of Nets}, author = {Sara Porat and Michael Yoeli}, year = {1984}, researchr = {https://researchr.org/publication/PoratY84}, cites = {0}, citedby = {0}, journal = {J. Comput. Syst. Sci.}, volume = {29}, number = {2}, pages = {198-206}, }