RFCs:

[RFC 1821] Integration of Real-time Services in an IP-ATM Network Architecture.

[RFC 2105] Cisco Systems' Tag Switching Architecture Overview.

[RFC 2309] Recommendations on Queue Management and Congestion Avoidance in the Internet.

[RFC 2688] Integrated Services Mappings for Low Speed Networks.

[RFC 2997] Specification of the Null Service Type.

[RFC 2998] A Framework for Integrated Services Operation over Diffserv Networks.

[RFC 3006] Integrated Services in the Presence of Compressible Flows.

[RFC 3035] MPLS using LDP and ATM VC Switching.

[RFC 3175] Aggregation of RSVP for IPv4 and IPv6 Reservations.

[RFC 3246] An Expedited Forwarding PHB (Per-Hop Behavior).

[RFC 3270] Multi-Protocol Label Switching (MPLS) Support of Differentiated Services.

Publications:

[ISBN 1558605142] Computer Networks: A Systems Approach.

[ISBN 155860832X] Computer Networks: A Systems Approach, 3rd Edition.

[ISBN 1558606564] MPLS: Technology and Applications.

[ISBN 1558605053] Switching in IP Networks: IP Switching, Tag Switching and Related Technologies.

Davie, Bruce; Farinacci, Dino; Katz, Dave; Rekhter, Yakov; Rosen, Eric C.; Swallow, George.
Tag Switching Architecture Overview.
December 1997. Proceedings of the IEEE, Vol. 85, No. 12.