Lukasz Czekaj, Jarek K. Korbicz, Ravindra W. Chhajlany, Pawel Horodecki. Superadditivity of multiple access gaussian channels. In Ryszard Horodecki, Sergei Ya. Kilin, Janusz Kowalik, editors, Quantum Cryptography and Computing. Volume 26 of NATO Science for Peace and Security Series - D: Information and Communication Security, pages 171-178, IOS Press, 2010. [doi]
Abstract is missing.