TCP/IP Illustrated, Vol. 1: The Protocols (Addison-Wesley Professional Computing Series)

TCP High-Speed Extensions (Chapter 24)

A publicly available source code implementation of the TCP window scale option, time-stamp option, and PAWS algorithm is available as a set of patches to the BSD Net/2 release from the host uxc.cso.uiuc.edu in the file pub/tcplw.shar.Z.