@article{10_37236_853,
     author = {Edwin R. van Dam},
     title = {The spectral excess theorem for distance-regular graphs: a global (over)view},
     journal = {The electronic journal of combinatorics},
     year = {2008},
     volume = {15},
     doi = {10.37236/853},
     zbl = {1180.05130},
     url = {http://geodesic.mathdoc.fr/articles/10.37236/853/}
}