@article{MOMA_1989__108_2-3_178436,
     author = {Werner Georg Nowak},
     title = {On {Sums} of {Two} {Coprime} k-th {Powers.}},
     journal = {Monatshefte f\"ur Mathematik},
     pages = {47--58},
     year = {1989},
     volume = {108},
     number = {2-3},
     zbl = {0678.10034},
     url = {http://geodesic.mathdoc.fr/item/MOMA_1989__108_2-3_178436/}
}