@article{202002.0223,
	doi = {10.20944/preprints202002.0223.v1},
	url = {https://doi.org/10.20944/preprints202002.0223.v1},
	year = 2020,
	month = {February},
	publisher = {Preprints},
	author = {Hellinton H. Takada and Celma O. Ribeiro and Oswaldo L. V. Costa and Julio M. Stern},
	title = {Gini and Entropy Based Spread Indexes for Primary Energy Consumption Efficiency and CO<sub>2</sub> Emission},
	journal = {Preprints}
}