@article{JAC_2010__31_1_a1,
     author = {Dukes, P. and Sawchuck, N.},
     title = {Bounds on permutation codes of distance four},
     journal = {Journal of Algebraic Combinatorics},
     pages = {143--158},
     publisher = {mathdoc},
     volume = {31},
     number = {1},
     year = {2010},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/JAC_2010__31_1_a1/}
}