@article{DBLP:journals/siamcomp/HuntS87,
author = {Harry B. Hunt III and
Richard Edwin Stearns},
title = {Nonlinear Algebra and Optimization on Rings are ``Hard''},
journal = {SIAM J. Comput.},
volume = {16},
number = {5},
year = {1987},
pages = {910-929},
ee = {http://dx.doi.org/10.1137/0216059},
bibsource = {DBLP, http://dblp.uni-trier.de}
}