@article{JAC_2013__38_1_a2,
     author = {Cioab\u{a}, Sebastian M. and Koolen, Jack H.},
     title = {On the connectedness of the complement of a ball in distance-regular graphs},
     journal = {Journal of Algebraic Combinatorics},
     pages = {191--195},
     publisher = {mathdoc},
     volume = {38},
     number = {1},
     year = {2013},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/JAC_2013__38_1_a2/}
}