@article{10_4064_aa122_3_1,
     author = {William D. Banks and John B. Friedlander and Florian Luca and Francesco Pappalardi and Igor E. Shparlinski},
     title = {Coincidences in the values of the
 {Euler} and {Carmichael} functions},
     journal = {Acta Arithmetica},
     pages = {207--234},
     publisher = {mathdoc},
     volume = {122},
     number = {3},
     year = {2006},
     doi = {10.4064/aa122-3-1},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/aa122-3-1/}
}