@article{DCG_1990__5_2_131122,
     author = {D.J. Kleitman and D.Z. Du},
     title = {Diameter and {Radius} in the {Manhattan} {Metric.}},
     journal = {Discrete & computational geometry},
     pages = {351--356},
     publisher = {mathdoc},
     volume = {5},
     number = {2},
     year = {1990},
     zbl = {0696.52007},
     url = {http://geodesic.mathdoc.fr/item/DCG_1990__5_2_131122/}
}