Mobile IP Traversal of Network Address Translation (NAT) Devices. - Henrik Levkowetz; Sami Vaarala (RFC, 2003)

Extensible Authentication Protocol (EAP). - Bernard Aboba; Larry J. Blunk; John R. Vollbrecht; James Carlson; Henrik Levkowetz (RFC, 2004)

Problem Statement: Mobile IPv4 Traversal of Virtual Private Network (VPN) Gateways. - Farid Adrangi; Henrik Levkowetz (RFC, 2005)

Document Shepherding from Working Group Last Call to Publication. - Henrik Levkowetz; David Meyer; Lars Eggert; Allison Mankin (RFC, 2007)

Generic Notification Message for Mobile IPv4. - Hui Deng; Henrik Levkowetz; Vijay Devarapalli; Sri Gundavelli; Brian Haley (RFC, 2012)