@article{10_4064_aa102_4_6,
     author = {Pierre Kaplan and Kenneth S. Williams},
     title = {The genera representing a positive integer},
     journal = {Acta Arithmetica},
     pages = {353--361},
     publisher = {mathdoc},
     volume = {102},
     number = {4},
     year = {2002},
     doi = {10.4064/aa102-4-6},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/aa102-4-6/}
}