@article{10_4064_aa144_4_2,
     author = {L. Hajdu and N. Saradha},
     title = {On a problem of {Pillai} and its generalizations},
     journal = {Acta Arithmetica},
     pages = {323--347},
     publisher = {mathdoc},
     volume = {144},
     number = {4},
     year = {2010},
     doi = {10.4064/aa144-4-2},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/aa144-4-2/}
}