Ramírez, E.F. F. and Calil, S.J. 2004. Clinical Engineering: Part I - Origins (1942 - 1996). Semina: Ciências Exatas e Tecnológicas. 21, 4 (Dec. 2004), 27–33. DOI:https://doi.org/10.5433/1679-0375.2000v21n4p27.