Pepelnjak, Ivan. EIGRP Network Design Solutions: The Definitive Resource for EIGRP Design, Deployment, and Operation . Indianapolis, IN: Cisco Press, 2000. ISBN 1578701651.
Benjamin, Henry. CCNP Practical Studies: Routing . Indianapolis, IN: Cisco Press, 2002. ISBN 1587200546.
Logilent ”Leading the IT Industry in Live Hands-on Access to Real Network Devices: http://www.logilent.com/.
Enhanced IGRP: http://www.cisco.com/univercd/cc/td/doc/cisintwk/ito_doc/en_igrp.htm.
Pepelnjak, Ivan. 
Logilent ”Leading the IT Industry in Live Hands-on Access to Real Network Devices: http://www.logilent.com/. 