@article{SF_1992__45_3_135169,
     author = {D. Long},
     title = {On the structure of some group codes.},
     journal = {Semigroup forum},
     pages = {38--44},
     publisher = {mathdoc},
     volume = {45},
     number = {3},
     year = {1992},
     zbl = {0763.94005},
     url = {http://geodesic.mathdoc.fr/item/SF_1992__45_3_135169/}
}