@article{GDZPPN00236090X, title = {Ternary additive problems of Waring's type.}, journal = {Mathematica Scandinavica}, volume = {69}, year = {1991}, pages = {27-45}, zbl = {0759.11031}, url = {http://dml.mathdoc.fr/item/GDZPPN00236090X} }
Brüdern, Jörg. Ternary additive problems of Waring's type.. Mathematica Scandinavica, Tome 69 (1991) pp. 27-45. http://gdmltest.u-ga.fr/item/GDZPPN00236090X/