@article{JAC_2000__11_2_a2,
     author = {Hiraki, Akira and Nomura, Kazumasa and Suzuki, Hiroshi},
     title = {Distance-regular graphs of valency 6 and $a_1=1$},
     journal = {Journal of Algebraic Combinatorics},
     pages = {101--134},
     publisher = {mathdoc},
     volume = {11},
     number = {2},
     year = {2000},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/JAC_2000__11_2_a2/}
}