@article{JAC_2016__43_4_a4,
     author = {Fiol, M. A.},
     title = {The spectral excess theorem for distance-regular graphs having distance-$d$ graph with fewer distinct eigenvalues},
     journal = {Journal of Algebraic Combinatorics},
     pages = {827--836},
     publisher = {mathdoc},
     volume = {43},
     number = {4},
     year = {2016},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/JAC_2016__43_4_a4/}
}