M. Aron, E. Kerrien, M. Berger, and Y. Laprie, Coupling electromagnetic sensors and ultrasound images for tongue tracking: acquisition setup and preliminary results, Int. Seminar on Speech Production, pp.435-442, 2006.
URL : https://hal.archives-ouvertes.fr/inria-00110634

M. Bonvalet, Les principes variationnels, 1993.

R. Fletcher, Practical methods of optimization, 1987.
DOI : 10.1002/9781118723203

Y. Laprie and B. Mathieu, A variational approach for estimating vocal tract shapes from the speech signal, Proceedings of the 1998 IEEE International Conference on Acoustics, Speech and Signal Processing, ICASSP '98 (Cat. No.98CH36181), pp.929-932
DOI : 10.1109/ICASSP.1998.675418

S. Maeda, Un modèle articulatoire de la langue avec des composantes linéaires [6] S. Maeda. Compensatory articulation during speech: Evidence from the analysis and synthesis of vocal tract shapes using an articulatory model, Actes 10emes Journees d' Etude sur la Parole, pp.152-162, 1979.

S. Ouni and Y. Laprie, Modeling the articulatory space using a hypercube codebook for acoustic-to-articulatory inversion, The Journal of the Acoustical Society of America, vol.118, issue.1, pp.444-460, 2005.
DOI : 10.1121/1.1921448
URL : https://hal.archives-ouvertes.fr/hal-00008682

C. Ueberhuber, Numerical Computation: Methods, Software, and Analysis, 1997.

Z. Zhang, Iterative point matching for registration of free-form curves and surfaces, International Journal of Computer Vision, vol.7, issue.3, pp.119-152, 1994.
DOI : 10.1007/BF01427149

A. Zierdt, P. Hoole, M. Honda, T. Kaburagi, and H. Tillmann, Extracting tongues from moving heads, Proc. 5th Speech Production Seminar, pp.313-316, 2000.