@article{10_4153_CJM_1969_144_2,
     author = {Blatt, D. and Szekeres, G.},
     title = {A {Skew} {Hadamard} {Matrix} of {Order} 52},
     journal = {Canadian journal of mathematics},
     pages = {1319--1322},
     year = {1969},
     volume = {21},
     number = {1},
     doi = {10.4153/CJM-1969-144-2},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CJM-1969-144-2/}
}