@article{MZ_1971__120_171539,
     author = {Falko Lorenz and Arnold Sch\"onhage},
     title = {\"Uber ein zahlentheoretisches {Problem} aus der {Fourieranalysis.}},
     journal = {Mathematische Zeitschrift},
     pages = {369--372},
     publisher = {mathdoc},
     volume = {120},
     year = {1971},
     zbl = {0212.09501},
     url = {http://geodesic.mathdoc.fr/item/MZ_1971__120_171539/}
}