@article{FORUM_1992__4_6_141665,
     author = {Robert Grossmann and Richard G. Larson},
     title = {The realization of input-output maps using bialgebras.},
     journal = {Forum mathematicum},
     pages = {109--122},
     publisher = {mathdoc},
     volume = {4},
     number = {6},
     year = {1992},
     zbl = {0754.16021},
     url = {http://geodesic.mathdoc.fr/item/FORUM_1992__4_6_141665/}
}