@article{MOMA_1989__108_2-3_178452,
     author = {Bogdan Szydlo},
     title = {\"Uber {Vorzeichenwechsel} einiger arithmetischer {Funktionen.} {III.}},
     journal = {Monatshefte f\"ur Mathematik},
     pages = {325--336},
     publisher = {mathdoc},
     volume = {108},
     number = {2-3},
     year = {1989},
     zbl = {0713.11080},
     url = {http://geodesic.mathdoc.fr/item/MOMA_1989__108_2-3_178452/}
}