1. Alciatore, D.G., Miranda, R., 1995. A winding number and point-in-polygon algorithm, Technical report, Colorado State University.
2. Speech analysis and synthesis by linear prediction of the speech wave;Atal;J. Acoust. Soc. Am.,1971
3. Boersma, P., Weenink, D., 2005. Praat: doing phonetics by computer. Computer program. Retrieved from: http://www.praat.org/.
4. Discrete-Time Processing of Speech Signals;Dellar,1999
5. Deng, L., Cui, X., Pruvenok, R., Huang, J., Momen, S., Chen, Y., Alwan, A., 2006. A database of vocal tract resonance trajectories for research in speech processing. In: Proc. ICASSP, pp. 60–63.