@article{article3c81d9a3,
title   = {Practical active-set Euclidian trust-region method with spectral projected gradients for bound-constrained minimization},
author = {Andretta, Marina and Birgin, Ernesto Julian Goldberg and Martínez, José Mário},
year = {2005},
doi = {10.1080/02331930500100270},
journal   = {Optimization, Oxon}
}