/usr/share/doc/nfs-utils-<version-number>/ — Replace <version-number> with the version number of the NFS package installed. This directory contains a wealth of information about the NFS implementation for Linux, including a look at various NFS configurations and their impact on file transfer performance.

man mount — Contains a comprehensive look at mount options for both NFS server and client configurations.

man fstab — Gives details for the format of the /etc/fstab file used to mount file systems at boot-time.

man nfs — Provides details on NFS-specific file system export and mount options.

man exports — Shows common options used in the /etc/exports file when exporting NFS file systems.

https://nfs.sourceforge.net/ — The home of the Linux NFS project and a great place for project status updates.

https://www.citi.umich.edu/projects/nfsv4/linux/ — An NFSv4 for Linux 2.6 kernel resource.

https://www.nfsv4.org — The home of NFS version 4 and all related standards.

https://www.vanemery.com/Linux/NFSv4/NFSv4-no-rpcsec.html — Describes the details of NFSv4 with Fedora Core 2, which includes the 2.6 kernel.

https://www.nluug.nl/events/sane2000/papers/pawlowski.pdf — An excellent whitepaper on the features and enhancements of the NFS Version 4 protocol.

https://wiki.autofs.net — The Autofs wiki, discussions, documentation and enhancements.

Managing NFS and NIS by Hal Stern, Mike Eisler, and Ricardo Labiaga; O'Reilly & Associates — Makes an excellent reference guide for the many different NFS export and mount options available.

NFS Illustrated by Brent Callaghan; Addison-Wesley Publishing Company — Provides comparisons of NFS to other network file systems and shows, in detail, how NFS communication occurs.