@article{MZ_1957__67_169665,
     author = {Oskar Perron},
     title = {Ein neuartiges diophantisches {Problem.}},
     journal = {Mathematische Zeitschrift},
     pages = {176--180},
     publisher = {mathdoc},
     volume = {67},
     year = {1957},
     zbl = {0077.26702},
     url = {http://geodesic.mathdoc.fr/item/MZ_1957__67_169665/}
}