@article{10_4064_cm_41_1_147_151,
     author = {Zbigniew Nowacki},
     title = {Monotonicity of multiplicative functions},
     journal = {Colloquium Mathematicum},
     pages = {147--151},
     publisher = {mathdoc},
     volume = {41},
     number = {1},
     year = {1979},
     doi = {10.4064/cm-41-1-147-151},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/cm-41-1-147-151/}
}