Stewien, Klaus Eberhard, Luís C.F. da Cunha, Aymoré de C. Alvim, Stelito A. dos Reis Filho, Maria A.B. Alvim, Alice A.P. Brandão, and Maria de N.R. Neiva. 1991. “ Rotavirus Associated Diarrhoea During Infancy in the City of S. Luís (MA), Brazil: A Two-Year Longitudinal Study ”. Revista Do Instituto De Medicina Tropical De São Paulo 33 (6): 459-64. https://www.revistas.usp.br/rimtsp/article/view/28873.