@article{10_4064_aa99_2_6,
     author = {Manfred K\"uhleitner and Werner Georg Nowak},
     title = {On sums of two $k$th powers:
a mean-square asymptotics over short intervals},
     journal = {Acta Arithmetica},
     pages = {191--203},
     publisher = {mathdoc},
     volume = {99},
     number = {2},
     year = {2001},
     doi = {10.4064/aa99-2-6},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/aa99-2-6/}
}