@article{JAC_2008__27_2_a3,
     author = {AbuGhneim, Omar A. and Smith, Ken W.},
     title = {Tightening {Turyn's} bound for {Hadamard} difference sets},
     journal = {Journal of Algebraic Combinatorics},
     pages = {187--203},
     publisher = {mathdoc},
     volume = {27},
     number = {2},
     year = {2008},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/JAC_2008__27_2_a3/}
}