@article{10_4153_CJM_1971_091_x,
     author = {Delsarte, P. and Goethals, J. M. and Seidel, J. J.},
     title = {Orthogonal {Matrices} with {Zero} {Diagonal.} {II}},
     journal = {Canadian journal of mathematics},
     pages = {816--832},
     year = {1971},
     volume = {23},
     number = {5},
     doi = {10.4153/CJM-1971-091-x},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CJM-1971-091-x/}
}