@article{10_14708_cm_v53i1_773,
     author = {D.P. Shukla and Shikha Yadav},
     title = {Generalized {Perfect} {Numbers}},
     journal = {Commentationes Mathematicae},
     pages = { 61--72},
     publisher = {mathdoc},
     volume = {53},
     number = {1},
     year = {2013},
     doi = {10.14708/cm.v53i1.773},
     language = {pl},
     url = {http://geodesic.mathdoc.fr/articles/10.14708/cm.v53i1.773/}
}