@article{DBLP:journals/mp/Yuan90,
author = {Y. Yuan},
title = {On a Subproblem of Trust Region Algorithms for Constrained
Optimization},
journal = {Math. Program.},
volume = {47},
year = {1990},
pages = {53-63},
ee = {http://dx.doi.org/10.1007/BF01580852},
bibsource = {DBLP, http://dblp.uni-trier.de}
}