@article{JAC_2003__18_3_a1,
     author = {Lang, Michael S.},
     title = {Leaves in representation diagrams of bipartite distance-regular graphs},
     journal = {Journal of Algebraic Combinatorics},
     pages = {245--254},
     publisher = {mathdoc},
     volume = {18},
     number = {3},
     year = {2003},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/JAC_2003__18_3_a1/}
}