1. Bickel, P., Doksum, K.: Mathematical Statistics: Basic Ideas and Selected Topics, vol. 1, 2nd edn. Prentice Hall, Upper Saddle River (2000)
2. Bunke, H.: Structural and syntactic pattern recognition. In: Chen, C.H., Pau, L.F., Wang, P.S.P. (eds.) Handbook of Pattern Recognition and Computer Vision, pp. 163–209. World Scientific-25, River Edge (1993)
3. Casella, G., Berger, R.: Statistical Inference, 2nd edn. Brooks/Cole Publisher Company, Pacific Grove (2001)
4. Duda, R., Hart, P., Stork, D.: Pattern Classification, 2nd edn. John Wiley and Sons, Inc., New York (2000)
5. El-Gendy, M.A., Bose, A., Shin, K.G.: Evolution of the internet QoS and support for soft real-time applications. Proc. IEEE 91, 1086–1104 (2003)