@article{JAC_1998__8_2_a6,
     author = {Araya, Makoto and Hiraki, Akira},
     title = {Distance-regular graphs with $c_i=b_{d-i}$ and antipodal double covers},
     journal = {Journal of Algebraic Combinatorics},
     pages = {127--138},
     publisher = {mathdoc},
     volume = {8},
     number = {2},
     year = {1998},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/JAC_1998__8_2_a6/}
}