@article{10_4153_CJM_1975_066_9,
     author = {Spence, Edward},
     title = {Skew-Hadamard {Matrices} of the {Goethals-Seidel} {Type}},
     journal = {Canadian journal of mathematics},
     pages = {555--560},
     year = {1975},
     volume = {27},
     number = {3},
     doi = {10.4153/CJM-1975-066-9},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CJM-1975-066-9/}
}