| References |
[1]: Peter H. Salus: A Quarter Century of UNIX, Addison-Wesley,
1994
[2]: Brian W. Kernighan, P.J Plauger: The Elements of
Programming Style, Second Edition, McGrow Hill, 1978
[3]: Marshal Kirk McKusic et al: The Design and Implementation
of the 4.4BSD Operating System, Adison-Wesley, 1996