NIELSEN, L. R. A Simple Correctness Proof of the Direct-Style Transformation. BRICS Report Series, [S. l.], v. 9, n. 2, 2002. DOI: 10.7146/brics.v9i2.21719. Disponível em: https://tidsskrift.dk/brics/article/view/21719. Acesso em: 8 may. 2024.