Bach, Maurice J., The Design of the Unix Operating System, Prentice Hall, Engelwood Cliffs, 1986
Fortgang, Karen S., UNIX System V User's Guide, Prentice Hall, Engelwood Cliffs, second edition, 1987
Manual Page for NFS, Sun Release 4.1, Last change: 24 November 1987
Silvester, Peter P., The Unix System Guidebook, Springer-Verlag, New York, 1988