@article{JAC_2004__20_2_a1,
     author = {Hiraki, Akira and Koolen, Jack},
     title = {A {Higman-Haemers} inequality for thick regular near polygons},
     journal = {Journal of Algebraic Combinatorics},
     pages = {213--218},
     publisher = {mathdoc},
     volume = {20},
     number = {2},
     year = {2004},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/JAC_2004__20_2_a1/}
}