1. The Aloha system — another alternative for computer communications;Abramson,1970
2. Ethernet: distributed packet switching for local computer networks;Metcalfe;Commun. ACM,1976
3. Loop-transmission control structures;West;IEEE Trans. Commun.,1972
4. Digital Communication loops — a survey;Hafner,1974
5. Loops for data communication;Fraser,1974