@article{MOMA_1982__93_178060,
     author = {Wolfgang M. Schmidt},
     title = {On {Cubic} {Polynomials} {I.Hua's} {Estimate} of {Exponential} {Sums.}},
     journal = {Monatshefte f\"ur Mathematik},
     pages = {63--74},
     publisher = {mathdoc},
     volume = {93},
     year = {1982},
     zbl = {0464.10026},
     url = {http://geodesic.mathdoc.fr/item/MOMA_1982__93_178060/}
}