@article{vivas-reyes_aria_2008,  title={Evaluation of group electronegativities and hardness (softness) of group 14 elements and containing functional groups through density functional theory and correlation with NMR spectra data},  volume={33},  ISSN={0100-4670},  url={https://doi.org/10.1590/S0100-46702008000300010},  DOI={10.1590/S0100-46702008000300010},  number={3},  journal={Eclética Química},  publisher={Fundação Editora da Universidade Estadual Paulista Júlio de Mesquita Filho - UNESP},  author={Vivas-Reyes, R. and Aria, A.},  year={2008},  pages={69–76} }