@article{RCM_2002_36_2_a1,
     author = {Florian Luca},
     title = {Infinite sets of positive integers whose sums are free of powers},
     journal = {Revista colombiana de matematicas},
     pages = {67--70},
     publisher = {mathdoc},
     volume = {36},
     number = {2},
     year = {2002},
     url = {http://geodesic.mathdoc.fr/item/RCM_2002_36_2_a1/}
}