Madureira, Adriano, 		Vidal, Douglas, 		de M. Junior, Harold, 		Figueiredo, Karla, 		Medonça, Lucas, 		Seruffo, Marcos, 		Paulino, Rita, AND 		Pires, Yomara.
" Analysis of publications on COVID-19 vaccines by Brazilians and the President of Brazil on Twitter" <em>Proceedings of the Regional School on Information Systems of Rio de Janeiro (ERSI-RJ)</em> [Online], (1 September 2021)