@article{JIS_2009__12_1_a6,
     author = {Johnson, Inga and Powers, Sean and Starr, Colin and Trevelyan, Charles and Webster, Craig},
     title = {Characterizing {Frobenius} semigroups by filtration},
     journal = {Journal of integer sequences},
     publisher = {mathdoc},
     volume = {12},
     number = {1},
     year = {2009},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/JIS_2009__12_1_a6/}
}