@article{KYB_1992_28_2_a6,
     author = {P\u{a}un, Gheorghe},
     title = {On the syntactic complexity of parallel communicating grammar systems},
     journal = {Kybernetika},
     pages = {155--166},
     year = {1992},
     volume = {28},
     number = {2},
     mrnumber = {1169217},
     zbl = {0754.68071},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/KYB_1992_28_2_a6/}
}