Dirk Janssens, Grzegorz Rozenberg. Hypergraph Systems and Their Extensions. ITA, 17(2):163-196, 1983.
@article{JanssensR83:0, title = {Hypergraph Systems and Their Extensions}, author = {Dirk Janssens and Grzegorz Rozenberg}, year = {1983}, researchr = {https://researchr.org/publication/JanssensR83%3A0}, cites = {0}, citedby = {0}, journal = {ITA}, volume = {17}, number = {2}, pages = {163-196}, }