@article{articled1874aa7,
title   = {Outer trust-region method for constrained optimization},
author = {Birgin, Ernesto Julian Goldberg and Castelani, Emerson and Martinez, André Luís Machado and Martínez, J. M},
year = {2011},
doi = {10.1007/s10957-011-9815-5},
journal   = {Journal of Optimization Theory and Applications}
}