1. El Gamal A (1981) On Information flow in relay networks. In: IEEE national telecommunications conference, vol 2, New Orleans, LA, USA, pp D4.1.1–D4.1.4
2. El Gamal A, Kim YH (2011) Network information theory. Cambridge University Press, Cambridge
3. Cover TM, Thomas JA (2006) Elements of information theory, 2nd edn. Wiley, New York
4. Ford LR Jr, Fulkerson DR (1962) Flows in networks. Princeton University Press, Princeton
5. Elias P, Feinstein A, Shannon C (1956) A note on the maximum flow through a network. IRE Trans Inf Theory 2(4):117–119