Despres, Remi (2010). "X.25 Virtual Circuits - TRANSPAC in France - Pre-Internet Data Networking". IEEE Communications Magazine. 48 (11): 40–46. doi:10.1109/MCOM.2010.5621965. ISSN1558-1896.
Rybczynski, Tony (2009). "Commercialization of packet switching (1975-1985): A Canadian perspective [History of Communications]". IEEE Communications Magazine. 47 (12): 26–31. doi:10.1109/MCOM.2009.5350364. ISSN1558-1896. S2CID23243636.
Després, Rémi (2010). Schwartz, Mischa (ed.). "X.25 Virtual Circuits – TRANSPAC In France – Pre-Internet Data Networking". IEEE Communications Magazine. 48 (11): 40–46. doi:10.1109/MCOM.2010.5621965. S2CID23639680.
Rybczynski, Tony (December 2009). "Commercialization of packet switching (1975-1985): A Canadian perspective [History of Communications]". IEEE Communications Magazine. 47 (12): 26–31. doi:10.1109/MCOM.2009.5350364. S2CID23243636.
Rybczynski, Tony (2009). "Commercialization of packet switching (1975-1985): A Canadian perspective [History of Communications]". IEEE Communications Magazine. 47 (12): 26–31. doi:10.1109/MCOM.2009.5350364. ISSN1558-1896. S2CID23243636.
Després, Rémi (2010). Schwartz, Mischa (ed.). "X.25 Virtual Circuits – TRANSPAC In France – Pre-Internet Data Networking". IEEE Communications Magazine. 48 (11): 40–46. doi:10.1109/MCOM.2010.5621965. S2CID23639680.
Rybczynski, Tony (December 2009). "Commercialization of packet switching (1975-1985): A Canadian perspective [History of Communications]". IEEE Communications Magazine. 47 (12): 26–31. doi:10.1109/MCOM.2009.5350364. S2CID23243636.
Despres, Remi (2010). "X.25 Virtual Circuits - TRANSPAC in France - Pre-Internet Data Networking". IEEE Communications Magazine. 48 (11): 40–46. doi:10.1109/MCOM.2010.5621965. ISSN1558-1896.
Rybczynski, Tony (2009). "Commercialization of packet switching (1975-1985): A Canadian perspective [History of Communications]". IEEE Communications Magazine. 47 (12): 26–31. doi:10.1109/MCOM.2009.5350364. ISSN1558-1896. S2CID23243636.