@article{article75533b57,
title   = {An inner–outer nonlinear programming approach for constrained quadratic matrix model updating},
author = {Andretta, Marina and Birgin, Ernesto Julian Goldberg and Raydan, Marcos},
year = {2016},
doi = {10.1016/j.ymssp.2015.05.002},
journal   = {Mechanical Systems and Signal Processing}
}