1. Ayokunle, O.O.: Integrating Voice over Internet Protocol (VoIP) technology as a communication tool on a converged network in Nigeria. ICT J. 2(11) (2012). ISSN 2223-4985
2. Sze, H.P., Liew, S.C., Senior Member IEEE, Lee, J.Y.B., Yip, D.C.S.: A multiplexing scheme for H.323 voice-over-IP applications. IEEE J. Sel. Areas Commun. 20(7) (2002)
3. Lee, C.-Y., Kim, H.-K., Ko, K.-H., Kim, J.-W., Jeong, H.-C.: A VoIP traffic monitoring system based on Net Flow v9. Int. J. Adv. Sci. Technol. 4 (2009)
4. Kos, A., Klepec, B., Tomazic, S.: Technique for performance improvement of VoIP applications. In: Electro Technical Conference, MELECON 2002, Published in IEEE Xplore (2002)
5. Uys, L.: Voice over internet protocol (VoIP) as a Communications tool in South African business. Afr. J. Bus. Manag. 3, 089–094 (2009). ISSN 1993-8233