@article{10_37236_2277,
     author = {Padraig \'O Cath\'ain},
     title = {Inequivalence of difference sets: on a remark of {Baumert}},
     journal = {The electronic journal of combinatorics},
     year = {2013},
     volume = {20},
     number = {1},
     doi = {10.37236/2277},
     zbl = {1267.05048},
     url = {http://geodesic.mathdoc.fr/articles/10.37236/2277/}
}