@article{KYB_1980_16_5_a0,
     author = {Ad\'amek, Ji\v{r}{\'\i} and Ehrig, Hartmut and Trnkov\'a, V\v{e}ra},
     title = {On an equivalence of system-theoretical and categorical concepts},
     journal = {Kybernetika},
     pages = {389--410},
     year = {1980},
     volume = {16},
     number = {5},
     mrnumber = {602266},
     zbl = {0454.18006},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/KYB_1980_16_5_a0/}
}