@article{TAC_2002_10_a10,
     author = {Michael Winter},
     title = {Derived {Operations} in {Goguen} {Categories}},
     journal = {Theory and applications of categories},
     pages = {220--247},
     publisher = {mathdoc},
     volume = {10},
     year = {2002},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/TAC_2002_10_a10/}
}