@article{Ferreira_2016,
title={Cost-optimal energy efficiency levels are the first step in achieving cost effective renovation in residential buildings with a nearly-zero energy target},
volume={133},
ISSN={0378-7788},
url={http://dx.doi.org/10.1016/j.enbuild.2016.10.017},
DOI={10.1016/j.enbuild.2016.10.017},
journal={Energy and Buildings},
publisher={Elsevier BV},
author={Ferreira,
M. and Almeida,
M. and Rodrigues,
A.},
year={2016},
month=dec,
pages={724–737} }