@article{MS2_1988__62_2_167038,
     author = {Se\'an Dineen and Richard M. Timoney},
     title = {The centroid of a {JB*-triple} system.},
     journal = {Mathematica Scandinavica},
     pages = {327--342},
     publisher = {mathdoc},
     volume = {62},
     number = {2},
     year = {1988},
     zbl = {0655.46044},
     url = {http://geodesic.mathdoc.fr/item/MS2_1988__62_2_167038/}
}