@article{10_4064_ap_8_2_173_176,
     author = {M. Sugunamma},
     title = {Certain results concerning $\ensuremath{\sigma}_k(n)$ and $\ensuremath{\varphi}_k(n)$},
     journal = {Annales Polonici Mathematici},
     pages = {173--176},
     publisher = {mathdoc},
     volume = {8},
     number = {2},
     year = {1960},
     doi = {10.4064/ap-8-2-173-176},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/ap-8-2-173-176/}
}