@article{KJM_2011_35_3_a11,
     author = {Adegoke S. A. Osifodunrin},
     title = {Do (1276, 51, 2) difference sets exist?},
     journal = {Kragujevac Journal of Mathematics},
     pages = {479 },
     publisher = {mathdoc},
     volume = {35},
     number = {3},
     year = {2011},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/KJM_2011_35_3_a11/}
}