@article{ITA_1979__13_2_107_0, author = {Ehrig, H. and K\"uhnel, W.}, title = {Categorical approach to nonlinear constant continuous-time systems}, journal = {RAIRO. Informatique th\'eorique}, pages = {107--133}, publisher = {EDP-Sciences}, volume = {13}, number = {2}, year = {1979}, zbl = {0417.93008}, mrnumber = {543936}, language = {en}, url = {http://www.numdam.org/item/ITA_1979__13_2_107_0/} }