Amaral, F., Manso, P., Schmidt, A., Sgarbieri, R., Vicente, W., Junior, C., & Somerville, J. (1969). Recommendations for starting a grown up congenital heart disease (GUCH) unit. Revista Brasileira de Cirurgia Cardiovascular : Orgao Oficial Da Sociedade Brasileira de Cirurgia Cardiovascular, 30(3), 373-9. https://doi.org/10.5935/1678-9741.20150037 (Original work published 1969)