@article{viégas_caeiro_ramos_2018,  title={A CONCEPTUAL MODEL FOR INTEGRATING NON-MATERIAL COMPONENTS IN SUSTAINABILITY ASSESSMENT},  volume={21},  ISSN={1414-753X},  url={https://doi.org/10.1590/1809-4422asoc0201r1vu18L4AO},  DOI={10.1590/1809-4422asoc0201r1vu18L4AO},  journal={Ambiente & Sociedade},  publisher={ANPPAS - Revista Ambiente e Sociedade},  author={VIÉGAS, OSVALDO and CAEIRO, SANDRA and RAMOS, TOMÁS},  year={2018} }