@article{articlef17bda5c,
title   = {Partial spectral projected gradient method with active-set strategy for linearly constrained optimization},
author = {Andretta, Marina and Birgin, Ernesto Julian Goldberg and Martínez, José Mário},
year = {2010},
doi = {10.1007/s11075-009-9289-9},
journal   = {Numerical Algorithms}
}