@article{10_4064_aa_2_2_197_211,
     author = {T Estermann},
     title = {On {Waring's} problem for fourth and higher powers},
     journal = {Acta Arithmetica},
     pages = {197--211},
     publisher = {mathdoc},
     volume = {2},
     number = {2},
     year = {1936},
     doi = {10.4064/aa-2-2-197-211},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/aa-2-2-197-211/}
}