@article{article57c7f0f0,
title   = {Enhanced index tracking optimal portfolio selection},
author = {Paulo, Wanderlei Lima de and Oliveira, Estela Mara de and Costa, Oswaldo Luiz do Valle},
year = {2016},
doi = {10.1016/j.frl.2015.10.005},
journal   = {Finance Research Letters}
}