Kirstein, Peter T. (2009). "The early history of packet switching in the UK". IEEE Communications Magazine. 47 (2): 18–26. doi:10.1109/MCOM.2009.4785372. S2CID34735326.
Kirstein, P.T. (1999). "Early experiences with the Arpanet and Internet in the United Kingdom". IEEE Annals of the History of Computing. 21 (1): 38–44. doi:10.1109/85.759368. S2CID1558618.
Bright, Roy D.; Smith, Michael A. (1973). "EXPERIMENTAL PACKET SWITCHING PROJECT OF THE UK POST OFFICE". Proceedings of the NATO Advanced Study Institute on Computer Communication Networks. Sussex, United Kingdom: Noordhoff International Publishing. pp. 435–44. Archived from the original on 2013-10-20. Retrieved 2013-08-30.
Kirstein, Peter T. (2009). "The early history of packet switching in the UK". IEEE Communications Magazine. 47 (2): 18–26. doi:10.1109/MCOM.2009.4785372. S2CID34735326.
Kirstein, P.T. (1999). "Early experiences with the Arpanet and Internet in the United Kingdom". IEEE Annals of the History of Computing. 21 (1): 38–44. doi:10.1109/85.759368. S2CID1558618.
Bright, Roy D.; Smith, Michael A. (1973). "EXPERIMENTAL PACKET SWITCHING PROJECT OF THE UK POST OFFICE". Proceedings of the NATO Advanced Study Institute on Computer Communication Networks. Sussex, United Kingdom: Noordhoff International Publishing. pp. 435–44. Archived from the original on 2013-10-20. Retrieved 2013-08-30.