@article{10_4064_aa_80_4_311_326,
     author = {Ronald Burthe},
     title = {Upper bounds for least witnesses and generating sets},
     journal = {Acta Arithmetica},
     pages = {311--326},
     publisher = {mathdoc},
     volume = {80},
     number = {4},
     year = {1997},
     doi = {10.4064/aa-80-4-311-326},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/aa-80-4-311-326/}
}