@article{TAC_2002_10_a2,
     author = {Michael Johnson and Robert Rosebrugh and R.J. Wood},
     title = {Entity-relationship-attribute designs and sketches},
     journal = {Theory and applications of categories},
     pages = {94--112},
     publisher = {mathdoc},
     volume = {10},
     year = {2002},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/TAC_2002_10_a2/}
}