@article{10_4064_aa_14_4_417_424,
     author = {Stanis{\l}aw Knapowski},
     title = {On {Siegel's} {Theorem}},
     journal = {Acta Arithmetica},
     pages = {417--424},
     publisher = {mathdoc},
     volume = {14},
     number = {4},
     year = {1968},
     doi = {10.4064/aa-14-4-417-424},
     language = {de},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/aa-14-4-417-424/}
}