1. Tanenbaum, A.: Computer Networks. 3nd edn. Prentice Hall, Upper Saddle River, NJ (1996)
2. Nassar, H.: Two-dimensional queueing model for a LAN gateway. WSEAS Trans. Commun. 5, 1585–1590 (2006)
3. Aczél, J.: Lectures on Functional Equations and Their Applications. Academic Press, New York (1966)
4. Aczél, J., Dhombres, J.: Functional Equations in Several Variables. Cambridge University Press, New York/Sydney (1989)
5. Woodward, M.E.: Communication and Computer Networks. IEEE Computer Society Press, Los Alamitos (1994)