@article{10_21136_MB_2000_126267,
     author = {Luca, Florian},
     title = {On the equation $\varphi (|x^m-y^m|)=2^n$},
     journal = {Mathematica Bohemica},
     pages = {465--479},
     publisher = {mathdoc},
     volume = {125},
     number = {4},
     year = {2000},
     doi = {10.21136/MB.2000.126267},
     mrnumber = {1802295},
     zbl = {0966.11002},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.21136/MB.2000.126267/}
}