Madureira, A., 		Vidal, D., 		de M. Junior, H., 		Figueiredo, K., 		Medonça, L., 		Seruffo, M., 		Paulino, R., & 		Pires, Y.
2021 Sep  1.  Analysis of publications on COVID-19 vaccines by Brazilians and the President of Brazil on Twitter. Proceedings of the Regional School on Information Systems of Rio de Janeiro (ERSI-RJ). [Online] :