@article{10_37236_1292,
     author = {Willem H. Haemers},
     title = {Disconnected vertex sets and equidistant code pairs},
     journal = {The electronic journal of combinatorics},
     year = {1997},
     volume = {4},
     number = {1},
     doi = {10.37236/1292},
     zbl = {0885.05083},
     url = {http://geodesic.mathdoc.fr/articles/10.37236/1292/}
}