@article{10_14708_cm_v52i2_5334,
     author = {D.P. Shukla and Shikha Yadav},
     title = {Composition of {Arithmetical} functions with generalization of perfect and related numbers},
     journal = {Commentationes Mathematicae},
     pages = { 153--170},
     publisher = {mathdoc},
     volume = {52},
     number = {2},
     year = {2012},
     doi = {10.14708/cm.v52i2.5334},
     language = {pl},
     url = {http://geodesic.mathdoc.fr/articles/10.14708/cm.v52i2.5334/}
}