K.E. ESWARI; S. PRIYADHARSHINI. Securing SAP Invoices using Document Signer Certificates . International journal of intellectual advancements and research in engineering computations, [S. l.], v. 6, n. 2, p. 1597–1601, 2018. Disponível em: https://ijiarec.com/ijiarec/article/view/702. Acesso em: 5 may. 2024.