@article{TAC_2007_19_a4,
     author = {J. Adamek and R. Borger and S. Milius and J. Velebil},
     title = {Iterative algebras: {How} iterative are they?},
     journal = {Theory and applications of categories},
     pages = {61--92},
     publisher = {mathdoc},
     volume = {19},
     year = {2007},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/TAC_2007_19_a4/}
}