HÜTTEL, H.; SRBA, J. Recursive Ping-Pong Protocols. BRICS Report Series, [S. l.], v. 10, n. 47, 2003. DOI: 10.7146/brics.v10i47.21819. Disponível em: https://tidsskrift.dk/brics/article/view/21819. Acesso em: 25 apr. 2024.