@article{10_4064_aa123_4_7,
     author = {Florian Luca and Ayyadurai Sankaranarayanan},
     title = {On the moments of the {Carmichael} $\lambda $ function},
     journal = {Acta Arithmetica},
     pages = {389--398},
     publisher = {mathdoc},
     volume = {123},
     number = {4},
     year = {2006},
     doi = {10.4064/aa123-4-7},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/aa123-4-7/}
}